Patent US1920003A successfully refreshed from Google Patents.
US1920003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timing mechanism
Assignee: Gulf Research and Development Co
•
Filing: 1932-01-14
•
Granted: 1933-07-25
•
Expires: 1952-01-14
Abstract
No abstract record available.
Inventors
- 👤 Roy L Chenault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:22
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
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) | 1936-07-24 | 1937-01-23 | 1937-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-07-24 | 1941-01-23 | 1941-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-07-24 | 1945-01-23 | 1945-07-25 | $7700.00 | Window Closed / Lapsed |