US2497491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accumulator
Assignee: Oilgear Co
•
Filing: 1945-06-25
•
Granted: 1950-02-14
•
Expires: 1965-06-25
Abstract
No abstract record available.
Inventors
- 👤 James K Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:34
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/02; F15B1/04; F15B1/08; F16; F16L; F16L55/00; F16L55/04; F16L55/045; F16L55/05; F16L55/052; F15B2201/00; F15B2201/20; F15B2201/205; F15B2201/30; F15B2201/305; F15B2201/40; F15B2201/405; F15B2201/4056; F15B2201/41
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US361649A
Cited
US1051450A
Cited
US1103931A
Cited
US1448151A
Cited
US1647757A
Cited
US2343560A
Cited
US2399444A
Cited
US2390319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |