Patent US3017698A successfully refreshed from Google Patents.
US3017698A
Expired / Lapsed
US
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Air filter with integral frame
Assignee: Research Products Corp
•
Filing: 1958-03-25
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Granted: 1962-01-23
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Expires: 1978-03-25
Abstract
No abstract record available.
Inventors
- 👤 Albert H Hambrecht
- 👤 Fred L Bartels
- 👤 Larrie L Isenring
- 👤 Carl B Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:54
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/10; B01D39/12; Y; Y10; Y10S; Y10S264/00; Y10S264/48; Y10S297/00; Y10S297/01; Y10S55/00; Y10S55/31; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1039; Y10T156/1041; Y10T156/1043; Y10T156/1044; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49604; Y10T29/49801; Y10T29/49826; Y10T29/49908
Claims Analysis
Total Claims: 0
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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) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |