Patent US3443522A successfully refreshed from Google Patents.
US3443522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive-displacement pump
Assignee: Individual
•
Filing: 1967-07-10
•
Granted: 1969-05-13
•
Expires: 1987-07-10
Abstract
No abstract record available.
Inventors
- 👤 Werner Schindler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:24
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/24; F04C14/26; F04C14/265
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1853430A
Cited
US1944648A
Cited
US1877688A
Cited
US2079375A
Cited
US2405061A
Cited
US2437791A
Cited
US2627232A
Cited
US2787963A
Cited
US2786553A
Cited
US2915977A
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 |