US3534909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control valve and co-axial variable injector
Assignee: National Aeronautics and Space Administration
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Filing: 1968-05-21
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Granted: 1970-10-20
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Expires: 1988-05-21
Abstract
No abstract record available.
Inventors
- 👤 Louis A Rosales
- 👤 Albert L Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:59
CPC Classifications
F; F16; F16K; F16K31/00; F02; F02K; F02K9/00; F02K9/42; F02K9/44; F02K9/52; F02K9/56; F02K9/58; F23; F23C; F23C7/00; F23C7/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |