US2634744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam trap and air vent valve therefor
Assignee: Individual
•
Filing: 1949-05-11
•
Granted: 1953-04-14
•
Expires: 1969-05-11
Abstract
No abstract record available.
Inventors
- 👤 Wells Herbert James Clement
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:35
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/38; F16T1/45; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3009; Y10T137/3084; Y10T137/309; Y10T137/3093; Y10T137/7287; Y10T137/7358; Y10T137/7439
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) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |