US2761470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot controlled valves
Assignee: Individual
•
Filing: 1953-04-14
•
Granted: 1956-09-04
•
Expires: 1973-04-14
Abstract
No abstract record available.
Inventors
- 👤 Carl T Batts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:34
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/40; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US796005A
Cited
US1095935A
Cited
US1791570A
Cited
US2230644A
Cited
US2240079A
Cited
US2285323A
Cited
US2319578A
Cited
US2479359A
Cited
FR985491A
Cited
US2524142A
Cited
US2661182A
Cited
US2624542A
Cited
US2645450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |