US3428055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter elements and additive therefor
Assignee: Eastman Kodak Co
•
Filing: 1965-04-09
•
Granted: 1969-02-18
•
Expires: 1985-04-09
Abstract
No abstract record available.
Inventors
- 👤 Bobby J Sublett
- 👤 Cephas H Sloan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:35
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2172946A
Cited
US2832351A
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GB760772A
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US2923378A
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US2854473A
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US3021242A
Cited
US3101723A
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US3217719A
Cited
US3320961A
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US3199946A
Cited
US3368566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |