Patent US2819677A successfully refreshed from Google Patents.
US2819677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cam actuated reciprocating blade constant area rotary pump
Assignee: Individual
•
Filing: 1955-09-20
•
Granted: 1958-01-14
•
Expires: 1975-09-20
Abstract
No abstract record available.
Inventors
- 👤 Harry A Leath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:24
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/3446
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US5574A
Cited
US115254A
Cited
US154100A
Cited
US216280A
Cited
US290035A
Cited
US425562A
Cited
US605460A
Cited
US871807A
Cited
US921478A
Cited
US1020848A
Cited
US1040135A
Cited
US1245691A
Cited
FR575334A
Cited
US1807392A
Cited
US2207182A
Cited
US2545238A
Cited
GB646752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |