US2737203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breather and drainage valves for watertight enclosures
Assignee: Individual
•
Filing: 1954-04-07
•
Granted: 1956-03-06
•
Expires: 1974-04-07
Abstract
No abstract record available.
Inventors
- 👤 George M Marr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:06
CPC Classifications
H; H02; H02B; H02B1/00; H02B1/26; H02B1/28; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7871; Y10T137/794
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US963463A
Cited
US1510860A
Cited
US1399399A
Cited
US1476618A
Cited
US1783599A
Cited
US1957867A
Cited
GB564206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |