Patent US3987916A successfully refreshed from Google Patents.
US3347293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable bit construction for screwdrivers and the like
Assignee: Magna Driver Corp
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Filing: 1965-12-23
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Granted: 1967-10-17
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Expires: 1985-12-23
Abstract
No abstract record available.
Inventors
- 👤 Frederick G Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:43
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/0007; B25B23/0035; B25B15/00; Y; Y10; Y10S; Y10S403/00; Y10S403/07; Y10T; Y10T279/00; Y10T279/17; Y10T279/17761; Y10T279/17786; Y10T403/00; Y10T403/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
AN IMPLEMENT INCLUDING A BIT HOLDER HAVING A SOCKET OF POLYGONAL CROSS SECTION IN ONE END THEREOF, A BIT HAVING A PART OF POLYGONAL CROSS SECTION FORMED TO ENTER INTO SAID SOCKET AND FORMING A DRIVING FIT WITH SAID SOCKET AND HAVING AN OUTER END EXTENDING BEYOND SAID SOCKET, A CIRCUMFERENTIAL GROOVE IN THE INNER WALL OF SAID SOCKET ADJACENT TO THE OUTER END THEREOF, SAID BIT BEING PROVIDED WITH NOTCHES IN CIRCULAR ARRANGEMENT ABOUT SAID BIT AND,
Claim 2
Dependent Claim
78 words
AN IMPLEMENT INCLUDING A BIT HOLDER HAVING A SOCKET OF POLYGONAL CROSS SECTION IN ONE END THEREOF, A BIT HAVING A PART OF POLYGONAL CROSS SECTION FORMED TO ENTER INTO SAID SOCKET AND FORMING A DRIVING FIT WITH SAID SOCKET AND HAVING AN OUTER END EXTENDING BEYOND SAID SOCKET, A CIRCUMFERENTIAL GROOVE IN THE INNER WALL OF SAID SOCKET ADJACENT TO THE OUTER END THEREOF, SAID BIT BEING PROVIDED WITH NOTCHES IN CIRCULAR ARRANGEMENT ABOUT SAID BIT AND,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |