US3049240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtration equipment
Assignee: Permanent Filter Corp
•
Filing: 1959-07-20
•
Granted: 1962-08-14
•
Expires: 1979-07-20
Abstract
No abstract record available.
Inventors
- 👤 Paul A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:27
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/045; B01D17/06; B01D17/08; B01D17/10; Y; Y10; Y10S; Y10S210/00; Y10S210/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US985961A
Cited
US1654615A
Cited
US2598818A
Cited
US2725986A
Cited
US2657808A
Cited
US2800232A
Cited
US2953249A
Cited
US2911101A
Cited
US2877903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |