Patent US2223207A successfully refreshed from Google Patents.
US2581886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatically variable speed scavenge pump drive
Assignee: RTX Corp
•
Filing: 1947-02-04
•
Granted: 1952-01-08
•
Expires: 1967-02-04
Abstract
No abstract record available.
Inventors
- 👤 Albert M Rockwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:02
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/72; F16H3/721; F16H3/722; F01; F01M; F01M1/00; F01M1/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |