US3437009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary fluid apparatus
Assignee: Individual
•
Filing: 1967-04-04
•
Granted: 1969-04-08
•
Expires: 1987-04-04
Abstract
No abstract record available.
Inventors
- 👤 John W Goodwyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:17
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/30; F01C1/34; F01C1/344; F04; F04C; F04C18/00; F04C18/30; F04C18/34; F04C18/344
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1594132A
Cited
US1819689A
Cited
US2100014A
Cited
US2380819A
Cited
US2504841A
Cited
GB724540A
Cited
US2898032A
Cited
US3186347A
Cited
US3157350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |