US2955712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure oil filter unit having threaded bowl assembly valve actuating means
Assignee: PARMATIC ENGINEERING Ltd
•
Filing: 1958-05-08
•
Granted: 1960-10-11
•
Expires: 1978-05-08
Abstract
No abstract record available.
Inventors
- 👤 Gutkowski Janusz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:59
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/147; B01D35/153
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US86158A
Cited
CA464360A
Cited
US1613166A
Cited
US1624526A
Cited
US1617048A
Cited
US1797198A
Cited
US1840883A
Cited
US2418777A
Cited
GB618523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |