Patent US3487746A successfully refreshed from Google Patents.
US3487746A
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Assignee: Individual
•
Filing: 1968-04-01
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Granted: 1970-01-06
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Expires: 1988-04-01
Abstract
No abstract record available.
Inventors
- 👤 Bertram H Kapnek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:40
CPC Classifications
F; F16; F16B; F16B29/00; F16B13/00; F16B13/04; F16B13/06; F16B13/061; Y; Y10; Y10S; Y10S411/00; Y10S411/913; Y10S411/955; Y10S411/965; Y10S411/97
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US330119A
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US2018251A
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US2236079A
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US2809070A
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US2897694A
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AT249953B
Cited
US3385156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |