US2997960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear pump
Assignee: Individual
•
Filing: 1957-12-20
•
Granted: 1961-08-29
•
Expires: 1977-12-20
Abstract
No abstract record available.
Inventors
- 👤 Kimijima Takehiko
- 👤 Toyoda Shigeo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:37
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0042; F04C2/00; F04C2/08; F04C2/082; F04C2/086
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |