US3443521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping equipment and operating mechanism
Assignee: CARL H STENDER
•
Filing: 1967-01-26
•
Granted: 1969-05-13
•
Expires: 1987-01-26
Abstract
No abstract record available.
Inventors
- 👤 Carl H Stender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:31
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/0009; F04B43/0081; F04B43/009; F04B43/02; F04B49/00; F04B49/12; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18176
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2197730A
Cited
FR870268A
Cited
US2548738A
Cited
US2873611A
Cited
US2909163A
Cited
US2972894A
Cited
FR1231767A
Cited
US3105442A
Cited
US3176623A
Cited
US3309474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |