US2547857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant filter
Assignee: Sackner Products Inc
•
Filing: 1947-11-10
•
Granted: 1951-04-03
•
Expires: 1967-11-10
Abstract
No abstract record available.
Inventors
- 👤 Wayne S Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:30
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/18; B01D29/00; B01D29/01; B01D29/012; B01D29/05; B01D29/07; B01D29/072; B01D29/073; B01D29/88; B01D29/92; B01D29/925; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49604
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US860720A
Cited
US2076935A
Cited
US2110009A
Cited
US2188923A
Cited
US2247445A
Cited
US2200795A
Cited
US2343636A
Cited
US2348651A
Cited
US2413556A
Cited
US2347384A
Cited
US2427733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |