Patent US2422381A successfully refreshed from Google Patents.
Patent US1732009A successfully refreshed from Google Patents.
US1732009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for development of power
Assignee: W S Garstow & Co
•
Filing: 1927-11-03
•
Granted: 1929-10-15
•
Expires: 1947-11-03
Abstract
No abstract record available.
Inventors
- 👤 Ernest M Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:33
CPC Classifications
F; F01; F01K; F01K7/00; F01K7/16; F01K7/22
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) | 1932-10-14 | 1933-04-15 | 1933-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-10-14 | 1937-04-15 | 1937-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-10-14 | 1941-04-15 | 1941-10-15 | $7700.00 | Window Closed / Lapsed |