Patent US2784040A successfully refreshed from Google Patents.
US2784040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retaining devices for pump liners
Assignee: Individual
•
Filing: 1953-07-15
•
Granted: 1957-03-05
•
Expires: 1973-07-15
Abstract
No abstract record available.
Inventors
- 👤 Cornelius R Head
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:22
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/16; F04B53/162; F04B53/166; F04B53/168
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1510042A
Cited
US1584843A
Cited
CH167253A
Cited
US2282254A
Cited
US2640434A
Cited
US2650868A
Cited
US2665178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |