Sustainable Technologies in Space: Protecting Innovation for a Greener Frontier

The modern space race is not just about reaching farther. Although it’s exciting to think that one day we might have holidays on other planets, space travel and exploration in the 21^st century are also enabling advances in scientific knowledge and innovative technologies with applications on Earth.

As investment in the global space sector accelerates, businesses are facing increasing pressure to balance innovation with sustainability. Whether developing reusable launch systems, satellite servicing technologies, advanced materials or next-generation propulsion systems, organisations must not only solve complex technical challenges but also secure the intellectual property that underpins commercial success.

From orbital debris threatening vital communication systems to the environmental cost of rocket launches, the sustainability of space activities is now a global concern. Innovators are responding with technologies designed to reduce waste, cut emissions, and extend the life of space assets. However, technological ingenuity alone is not enough. For sustainable technologies to thrive, they require the support of robust intellectual property (IP) frameworks that attract investment, safeguard innovation, and foster international collaboration.

Environmental sustainability efforts in the space sector focus on minimising pollution, reducing launch emissions, and tackling the mounting problem of space debris.  Thousands of defunct satellites, spent rocket stages, and fragments from past missions now orbit Earth, threatening satellites, spacecraft, and future space operations. Sustainable space design must therefore not only emphasise debris mitigation, satellite servicing, and responsible end-of-life disposal, but also provide ways to reduce debris in the space environment.

The push for sustainable space technologies has unleashed a wave of innovation, including:

• Reusable Launch Systems: Once considered impossible, reusable rockets have vastly improved the prospects of space sustainability, as well as cost efficiency. Blue Origin’s New Shepard and SpaceX’s Starship & Super Heavy exemplify how reusability drastically lowers both cost and material waste, setting new industry standards.
• Green Propellants: Alternatives to traditional hydrazine fuels, such as hydroxylammonium nitrate-based propellants (like NASA’s “AF-M315E”), aim to boast safer handling and cleaner combustion, reducing risks both on Earth and in orbit.
• Closed-Loop Life Support Systems: For long-duration missions to Mars or even further into space, recycling air, water, and waste will be essential. NASA’s Environmental Control and Life Support System (ECLSS) aboard the International Space Station (ISS) already recycles about 98% of its water, offering a model for future sustainable habitats. Similarly, the European Space Agency (ESA)’s Advanced Closed Loop system (ACLS) recycles carbon dioxide into oxygen, representing a significant improvement over legacy systems, which require a constant supply of water from Earth.
• Satellite Servicing and Debris Removal: Start-ups like Astroscale and ClearSpace are developing spacecraft capable of docking with, refuelling, or deorbiting old satellites, paving the way for orbital maintenance economies that prevent debris accumulation, thereby improving the safety of orbital travel.
• Additive Manufacturing in Space: 3D printing aboard the ISS and other proposed orbital platforms enables components to be built on demand using recycled elements, reducing launch payloads and costs. Further, raw 3D printer material (e.g. powder, filament, etc.) can generally be transported more efficiently than fully manufactured components, reducing launch costs and payload constraints.
• Solar Energy Harvesting: Concepts for space-based solar power aim to collect energy in orbit and beam it to Earth, offering a huge source of clean power if technical and political challenges can be overcome.

Together, these technologies not only promise a cleaner and more efficient space industry but also reflect a broader cultural shift: sustainability is no longer a constraint on innovation – it is its catalyst.

The Crucial Role of IP Rights

Behind every breakthrough lies a period of research, which can often be capital-intensive, especially within the aerospace sector. IP rights serve as a foundation that makes innovation (and the capital propelling the innovation) protectable and sustainable. For organisations operating in the space sector, a well-structured IP strategy can be the difference between securing investment and losing a competitive advantage. Investors increasingly scrutinise ownership of key technologies, while collaborative projects require clear frameworks for managing IP rights and commercialisation opportunities.

1. Attracting Investment:

Developing new propulsion systems or orbital recycling technologies requires enormous upfront capital. Investors, particularly in the private space sector, seek assurance that their funding will yield protected, monetisable results. Strong IP protection, such as patents, trade secrets, and licensing frameworks, create this security.

2. Encouraging Collaboration:

Sustainability in space is inherently multidisciplinary and international. It demands collaboration among private companies, research institutions, and national agencies. Well-defined IP agreements provide the legal clarity necessary for such partnerships to thrive, ensuring that contributions are properly attributed and that results can be shared without fear of exploitation.

3. Balancing Openness and Protection:

While some level of IP protection is vital, overly restrictive controls can stifle the open collaboration needed for global sustainability goals. The challenge is to balance proprietary rights with shared knowledge, especially for technologies addressing global challenges like debris mitigation or environmental monitoring. Initiatives such as open licensing or patent pools can help level the technological landscape.

Challenges at the Intersection of Sustainability and IP

Despite growing awareness, the space industry faces several unresolved issues at the crossroads of sustainability and IP:

• Jurisdictional Ambiguity: Determining where IP laws apply in space is legally complex. Without clear jurisdiction, enforcing patents or resolving disputes remains difficult.
• Potential Monopolisation: As a few large corporations dominate critical technologies, such as reusable launch systems or debris mitigation, there is a risk that proprietary control could hinder broad adoption of sustainable practices.
• Barriers for Emerging Nations: Many developing countries are seeking to enter the space economy but face hurdles accessing key technologies protected by patents or restricted export regimes.
• Ethical Use and Dual-Use Concerns: Some technologies designed for sustainability can also have military or surveillance applications, raising questions about responsible licensing and transparency.

While these challenges exist, they are not insurmountable. For example:

• Jurisdictional Ambiguity: Continued international cooperation and the development of harmonised legal frameworks could provide greater certainty for IP ownership and enforcement in space activities.
• Potential Monopolisation: Strategic licensing models by IP service providers, patent pools, and collaborative industry initiatives may help encourage adoption of sustainable technologies while preserving incentives for innovation.
• Barriers for Emerging Nations: Technology transfer arrangements, research collaborations, and carefully structured licensing programmes by IP service providers can facilitate access to important space technologies.
• Ethical and Dual-Use Concerns: Robust contractual controls, due diligence procedures, and responsible licensing practices can help ensure technologies are used consistently with their intended purpose.

The legal framework governing activities beyond Earth is itself continuing to develop. For a broader discussion of jurisdictional challenges in space, please see articles from Jess Davis and Joe Baumber, titled “Patents Beyond Earth”.

A Sustainable Future Among the Stars

As humanity ventures further into orbit and beyond, we must ensure that our technological progress reflects our values: stewardship, collaboration, and shared prosperity. Protecting the ideas that make sustainable space exploration possible is essential not just for investors or inventors, but for the collective future of humankind.

As sustainability becomes a defining priority for the space sector, organisations that can successfully combine technological innovation with robust IP protection will be best placed to attract investment, deliver long-term value and shape the future of the industry. Developing an IP strategy alongside technological development is no longer simply a legal consideration; it is a critical component of commercial success.

This article was prepared by Patent Attorney Dan Cooper

More articles from our world space week series below:

• Patents Beyond Earth: Is Space a No Man’s Land? Part 1
• Patents Beyond Earth: Do we need a Martian Patent Office? Part 2
• Patent Feeding Space Travel: The Chemistry of Living in Space
• Materials at the Final Frontier: How Engineering Innovations Are Powering the Future of Space

For more information contact our Transport, Aerospace & Defence team