US3021790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump delivery control mechanism
Assignee: BLACKMER PUMP CO
•
Filing: 1958-05-23
•
Granted: 1962-02-20
•
Expires: 1978-05-23
Abstract
No abstract record available.
Inventors
- 👤 Virgil A Brunson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:12
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/14; G05D16/16; G05D16/163; G05D16/18; F; F04; F04B; F04B49/00; F04B49/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2409975A
Cited
US2411574A
Cited
US2683418A
Cited
US2625108A
Cited
US2747598A
Cited
US2829664A
Cited
US2958291A
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 |