Patent US2082972A successfully refreshed from Google Patents.
US2082972A
Expired / Lapsed
US
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Valve and the like
Assignee: Individual
•
Filing: 1936-07-06
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Granted: 1937-06-08
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Expires: 1956-07-06
Abstract
No abstract record available.
Inventors
- 👤 Ira D Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:47
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/20; F16K15/14; F16K15/144; F16K15/147; F16K2200/00; F16K2200/40; F16K2200/401; Y; Y10; Y10S; Y10S152/00; Y10S152/07; Y10T; Y10T137/00; Y10T137/3584; Y10T137/374; Y10T137/7722; Y10T137/7837; Y10T137/7847; Y10T137/7848; Y10T137/7879; Y10T137/788; Y10T137/7882
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-06-07 | 1940-12-07 | 1941-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-06-07 | 1944-12-07 | 1945-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-06-07 | 1948-12-07 | 1949-06-08 | $7700.00 | Window Closed / Lapsed |