US2288997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas flow control valve for signal lights
Assignee: Individual
•
Filing: 1940-06-18
•
Granted: 1942-07-07
•
Expires: 1960-06-18
Abstract
No abstract record available.
Inventors
- 👤 Daniel H Eggert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:55
CPC Classifications
B; B63; B63B; B63B22/00; B63B22/16; B63B22/166; B63B2201/00; B63B2201/04; B63B2201/06
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) | 1945-07-06 | 1946-01-05 | 1946-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-06 | 1950-01-05 | 1950-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-06 | 1954-01-05 | 1954-07-07 | $7700.00 | Window Closed / Lapsed |