Patent US2266674A successfully refreshed from Google Patents.
Patent US1630273A successfully refreshed from Google Patents.
US1630273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplex-cam motor
Assignee: DUPLEX MOTOR Co
•
Filing: 1926-06-17
•
Granted: 1927-05-31
•
Expires: 1946-06-17
Abstract
No abstract record available.
Inventors
- 👤 Henry A Nordwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:26
CPC Classifications
F; F01; F01B; F01B9/00; F01B9/04; F01B9/06; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02B75/222; F01B2009/061; F01B2009/065; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/1828; Y10T74/21; Y10T74/2101; Y10T74/2107
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1930-05-30 | 1930-11-29 | 1931-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-05-30 | 1934-11-29 | 1935-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-05-30 | 1938-11-29 | 1939-05-31 | $7700.00 | Window Closed / Lapsed |