Patent US3296874A successfully refreshed from Google Patents.
Patent US3381070A successfully refreshed from Google Patents.
US3381070A
Expired / Lapsed
US
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Method of producing a filter element
Assignee: Eastman Kodak Co
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Filing: 1964-09-08
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Granted: 1968-04-30
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Expires: 1984-09-08
Abstract
No abstract record available.
Inventors
- 👤 Bobby J Sublett
- 👤 George P Touey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:06
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/14; A24D3/16; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D39/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |