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Patent US3493009A successfully refreshed from Google Patents.
US3493009A
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Assignee: HOWARD M RICHARDSON
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Filing: 1967-09-06
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Granted: 1970-02-03
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Expires: 1987-09-06
Abstract
No abstract record available.
Inventors
- 👤 Howard M Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:51
CPC Classifications
A; A61; A61G; A61G15/00; A61G15/14; A61G15/16; B; B65; B65H; B65H75/00; B65H75/02; B65H75/34; B65H75/38; B65H75/44; B65H75/4478; F; F16; F16L; F16L3/00; F16L3/01; F16L3/012; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6918; Y10T137/6921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2071174A
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US2458343A
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US2627074A
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US2640724A
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US2768843A
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US2948554A
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US3186723A
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US3384108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |