US3322281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter assembly having plural check valves
Assignee: General Electric Co
•
Filing: 1964-08-07
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Granted: 1967-05-30
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Expires: 1984-08-07
Abstract
No abstract record available.
Inventors
- 👤 William K Gulick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:36
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/04; F15B21/041; B; B01; B01D; B01D29/00; B01D29/11; B01D29/114; B01D35/00; B01D35/14; B01D35/147; B01D35/15; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838
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) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |