US3398904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter cartridge winding apparatus
Assignee: Commercial Filters Corp
•
Filing: 1966-08-05
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Granted: 1968-08-27
•
Expires: 1986-08-05
Abstract
No abstract record available.
Inventors
- 👤 Edward R Adams
- 👤 Jim L Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:14
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D29/216; B65; B65H; B65H54/00; B65H54/02; B65H54/28; B65H54/2806; B65H54/2809; B65H54/2818; B65H2701/00; B65H2701/30; B65H2701/31; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18304; Y10T74/18312; Y10T74/21; Y10T74/2101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE422401C
Cited
US786862A
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US827130A
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US895455A
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GB191102437A
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GB341118A
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US2328344A
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DE953864C
Cited
US3193209A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |