US3386648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary vane type pump
Assignee: Individual
•
Filing: 1967-01-31
•
Granted: 1968-06-04
•
Expires: 1987-01-31
Abstract
No abstract record available.
Inventors
- 👤 Walter J Van Rossem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:14
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/30; F04C18/34; F04C18/344; F04C18/3441; F04C18/3442; F04C25/00; F04C2220/00; F04C2220/10; F05; F05C; F05C2201/00; F05C2201/04; F05C2201/0469; F05C2201/0475; F05C2201/0484; F05C2201/90; F05C2201/903; F05C2251/00; F05C2251/10; Y; Y10; Y10S; Y10S418/00; Y10S418/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2731919A
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US1718112A
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US1675686A
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US2651453A
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US2622529A
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US2683994A
Cited
US2809593A
Cited
US2809588A
Cited
US3237851A
Cited
US3235172A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |