US1790168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control valve for car doors
Assignee: National Pneumatic Co Inc
•
Filing: 1925-06-06
•
Granted: 1931-01-27
•
Expires: 1945-06-06
Abstract
No abstract record available.
Inventors
- 👤 Paul Abram Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:29
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/50; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86839; Y10T137/87056; Y10T74/00; Y10T74/20; Y10T74/20012
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) | 1934-01-26 | 1934-07-28 | 1935-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-01-26 | 1938-07-28 | 1939-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-01-26 | 1942-07-28 | 1943-01-27 | $7700.00 | Window Closed / Lapsed |