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US3473165A
Expired / Lapsed
US
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Venting device for pressurized space suit helmet
Assignee: National Aeronautics and Space Administration
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Filing: 1967-02-27
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Granted: 1969-10-21
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Expires: 1987-02-27
Abstract
No abstract record available.
Inventors
- 👤 Alfred A Gran
- 👤 Ronald Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:05
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/04; B; B64; B64G; B64G6/00
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) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |