US2775209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubrication means for rotary pumps
Assignee: Geo D Roper Corp
•
Filing: 1952-09-04
•
Granted: 1956-12-25
•
Expires: 1972-09-04
Abstract
No abstract record available.
Inventors
- 👤 John R Albright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:27
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0088
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1271970A
Cited
US1379587A
Cited
US1372576A
Cited
US1972271A
Cited
US1910083A
Cited
US2212994A
Cited
US2221412A
Cited
US2276107A
Cited
US2319374A
Cited
US2481143A
Cited
US2479077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |