US2885083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Peterson Filters and Engineering Co
•
Filing: 1956-06-01
•
Granted: 1959-05-05
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Expires: 1976-06-01
Abstract
No abstract record available.
Inventors
- 👤 Peterson C Lynn
- 👤 Bloddie L Derringe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:23
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/21; B01D33/23; B01D33/44; B01D33/46; B01D33/466
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US617367A
Cited
US977209A
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US1051160A
Cited
US1678639A
Cited
US1446448A
Cited
DE587642C
Cited
US2338549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |