US2481646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable delivery gear pump
Assignee: AT&T Inc
•
Filing: 1943-08-18
•
Granted: 1949-09-13
•
Expires: 1963-08-18
Abstract
No abstract record available.
Inventors
- 👤 Robert M Conklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:40
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/24; F04C14/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US767027A
Cited
US1285819A
Cited
US1486835A
Cited
US1912737A
Cited
US1985748A
Cited
US2380783A
Cited
US2405061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |