Patent US3495539A successfully refreshed from Google Patents.
US3495539A
Expired / Lapsed
US
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Rotary pump
Assignee: Toyoda Koki KK
•
Filing: 1967-12-15
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Granted: 1970-02-17
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Expires: 1987-12-15
Abstract
No abstract record available.
Inventors
- 👤 Tamaki Tomita
- 👤 Asahi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:06
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/24; F04C14/26; F04C2/00; F04C2/30; F04C2/34; F04C2/356; F04C2/3562; F04C2240/00; F04C2240/60; F04C2240/603
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US167489A
Cited
US349888A
Cited
US381287A
Cited
US2507151A
Cited
FR978151A
Cited
US2648952A
Cited
FR1061776A
Cited
US3314368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |