Patent US3022769A successfully refreshed from Google Patents.
US3022769A
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US
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Universal tool element retainer for rotary-hammer devices
Assignee: Skil Corp
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Filing: 1960-05-18
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Granted: 1962-02-27
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Expires: 1980-05-18
Abstract
No abstract record available.
Inventors
- 👤 Oliver O Amundsen
- 👤 Harold R Botefuhr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:08
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/08; B25D17/084; B25D17/082; B25D2211/00; B25D2211/06; B25D2211/068; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042; Y10T279/17085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1164560A
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US1472496A
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US1295439A
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US1684177A
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AT107129B
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US1675432A
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US1831818A
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GB316933A
Cited
US1969798A
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US2844378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |