US2949927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient inflation-deflation valve
Assignee: Individual
•
Filing: 1957-10-10
•
Granted: 1960-08-23
•
Expires: 1977-10-10
Abstract
No abstract record available.
Inventors
- 👤 Henry H Mackal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:30
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/20; F16K15/202; F16K15/14; F16K15/144; Y; Y10; Y10T; Y10T137/00; Y10T137/3584
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) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |