US2631665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple valve control unit
Assignee: Individual
•
Filing: 1950-12-18
•
Granted: 1953-03-17
•
Expires: 1970-12-18
Abstract
No abstract record available.
Inventors
- 👤 Eddie J Perrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:08
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/48; C; C02; C02F; C02F1/00; C02F1/42; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86445
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2290626A
Cited
US1725110A
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US1713105A
Cited
US2012194A
Cited
US2254795A
Cited
US2265225A
Cited
US2243815A
Cited
US2284158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |