US2916144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid filtering apparatus
Assignee: Individual
•
Filing: 1956-05-24
•
Granted: 1959-12-08
•
Expires: 1976-05-24
Abstract
No abstract record available.
Inventors
- 👤 Langnickel Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:04
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/22; B01D25/26; B01D24/00; B01D24/007; B01D24/02; B01D24/04; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2035851A
Cited
US2101961A
Cited
US2426618A
Cited
US2468296A
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US2547205A
Cited
US2625273A
Cited
US2693882A
Cited
US2691445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |