US3025963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Products useful as filtering devices and methods of making them
Assignee: RICHARD L JOHNSTON
•
Filing: 1958-03-13
•
Granted: 1962-03-20
•
Expires: 1978-03-13
Abstract
No abstract record available.
Inventors
- 👤 Jordan V Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:20
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/525; B01D27/00; B01D27/005; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D29/216; B01D29/50; B01D29/56; B01D29/58; B31; B31D; B31D5/00; B31D5/0082; B01D2201/00; B01D2201/18; B01D2201/182; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB377572A
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US2599604A
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AT177423B
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US2732031A
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GB764846A
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US2883058A
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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) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |