US2112641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety vent valve
Assignee: A W WHEATON BRASS WORKS
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Filing: 1936-09-25
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Granted: 1938-03-29
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Expires: 1956-09-25
Abstract
No abstract record available.
Inventors
- 👤 Abram W Wheaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:13
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/18; F16K17/19; F16K2200/00; F16K2200/20; F16K2200/202; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7772; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/7841; Y10T137/7842; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/794; Y10T137/8376
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) | 1941-03-28 | 1941-09-27 | 1942-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-03-28 | 1945-09-27 | 1946-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-03-28 | 1949-09-27 | 1950-03-29 | $7700.00 | Window Closed / Lapsed |