US2634949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary valve with indexing and locking devices
Assignee: CERTIFIED GAS EQUIPMENT Corp
•
Filing: 1947-11-25
•
Granted: 1953-04-14
•
Expires: 1967-11-25
Abstract
No abstract record available.
Inventors
- 👤 Robinson William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:51
CPC Classifications
F; F16; F16K; F16K35/00; F16K35/02; F16K35/027; F16K3/00; F16K3/02; F16K3/04; F16K3/06; F16K3/08; Y; Y10; Y10S; Y10S137/00; Y10S137/905; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US477706A
Cited
US919443A
Cited
US1395001A
Cited
US1786330A
Cited
US2069017A
Cited
US2126020A
Cited
US2142368A
Cited
US2220346A
Cited
US2215248A
Cited
US2361655A
Cited
US2362364A
Cited
US2344956A
Cited
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 |