US3021788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submersible pump
Assignee: American Crucible Products Co
•
Filing: 1957-05-02
•
Granted: 1962-02-20
•
Expires: 1977-05-02
Abstract
No abstract record available.
Inventors
- 👤 Herbert W Kaatz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:42
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; F04D13/06; F04D13/08; F04D13/086; F04D15/00; F04D15/02; F04D15/0209; F04D15/0218
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1031580A
Cited
US1253687A
Cited
US1634317A
Cited
US1744684A
Cited
US2028783A
Cited
US2137402A
Cited
US2220327A
Cited
US2406947A
Cited
US2488506A
Cited
US2699907A
Cited
US2660956A
Cited
US2730953A
Cited
US2741990A
Cited
US2768584A
Cited
US2787960A
Cited
US2804516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |