US3469375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sorption vacuum trap
Assignee: National Aeronautics and Space Administration
•
Filing: 1967-10-16
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Granted: 1969-09-30
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Expires: 1987-10-16
Abstract
No abstract record available.
Inventors
- 👤 Alfred E Barrington
- 👤 Anthony J Caruso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:44
CPC Classifications
F; F04; F04F; F04F9/00; F04F9/06; H; H01; H01J; H01J9/00; H01J9/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2777759A
Cited
US3137551A
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US3224168A
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US3199343A
Cited
US3264803A
Cited
US3335550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |