Patent CA728299A successfully refreshed from Google Patents.
US3487733A
Expired / Lapsed
US
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Extractor means
Assignee: RALPH W TOWNSEND
•
Filing: 1966-09-26
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Granted: 1970-01-06
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Expires: 1986-09-26
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:55
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/14; B25B27/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49721; Y10T29/49815; Y10T29/49822; Y10T29/53; Y10T29/53987
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2154654A
Cited
US2218131A
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US2391405A
Cited
US3033144A
Cited
US3195380A
Cited
US3279047A
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 |