US3529908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable output positive displacement bellows pump
Assignee: Gorman Rupp Co
•
Filing: 1968-10-07
•
Granted: 1970-09-22
•
Expires: 1988-10-07
Abstract
No abstract record available.
Inventors
- 👤 Edward M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:57
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B53/00; F04B53/10; F04B53/1037; F04B53/1047; F04B53/1057
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US226940A
Cited
US1981667A
Cited
US1893217A
Cited
US2900916A
Cited
GB946565A
Cited
US3169674A
Cited
US3354830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |