Patent US4354737A successfully refreshed from Google Patents.
Patent US2772607A successfully refreshed from Google Patents.
US2772607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making filters
Assignee: Motors Liquidation Co
•
Filing: 1954-07-19
•
Granted: 1956-12-04
•
Expires: 1974-07-19
Abstract
No abstract record available.
Inventors
- 👤 Russell S Thatcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:10
CPC Classifications
D; D21; D21J; D21J7/00; B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D39/00; B01D39/14; B01D39/16; B01D39/18; D21J1/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US740023A
Cited
US2395301A
Cited
US2388828A
Cited
US2601521A
Cited
US2681599A
Cited
US2553820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |