US2877901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering apparatus
Assignee: Individual
•
Filing: 1955-07-12
•
Granted: 1959-03-17
•
Expires: 1975-07-12
Abstract
No abstract record available.
Inventors
- 👤 Lawrence L Maus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:35
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/10; B23Q11/1069; B01; B01D; B01D33/00; B01D33/06; B01D35/00; B01D35/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US184427A
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US1516693A
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US993839A
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US1554943A
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US1840848A
Cited
US2191122A
Cited
US2336710A
Cited
US2494534A
Cited
US2559614A
Cited
US2660310A
Cited
US2715964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |