US3499389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Worm pump
Assignee: SEEBERGER KG
•
Filing: 1968-04-17
•
Granted: 1970-03-10
•
Expires: 1988-04-17
Abstract
No abstract record available.
Inventors
- 👤 Fritz Seeberger
- 👤 Werner Wehling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:48
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/107; F04C2/1071; F04C2/1073; F04C2/1075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2409688A
Cited
US2527673A
Cited
US2796029A
Cited
US2874643A
Cited
US3011445A
Cited
US2879920A
Cited
US3084631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |