US2901115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering apparatus
Assignee: Industrial Filter and Pump Manufacturing Co
•
Filing: 1957-05-24
•
Granted: 1959-08-25
•
Expires: 1977-05-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry Schmidt
- 👤 Raymond F Ledford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:31
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/16; B01D25/00; B01D25/22; B01D25/26; B01D25/28; B01D25/282; B01D25/284; B01D25/32; B01D25/34; B01D25/346; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1806513A
Cited
US2475561A
Cited
US1086477A
Cited
GB294501A
Cited
US2221210A
Cited
US2167236A
Cited
US2300789A
Cited
US2480320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |