Patent US2223287A successfully refreshed from Google Patents.
US4279552A
Expired / Lapsed
US
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Portable electric drill guide
Assignee: Individual
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Filing: 1979-11-05
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Granted: 1981-07-21
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Expires: 1999-11-05
Abstract
Abstract A portable electric drill guide in the form of a plurality of legs attached to two rings, the upper of which is attachable to a drill head and the lower of which is adapted to be placed in contact with an object to be drilled at right angles to the drill bit.
Inventors
- 👤 Ira J. Epstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:42
CPC Classifications
B; B25; B25H; B25H1/00; B25H1/0021; B25H1/0078; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/564; Y10T408/5653
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A portable electric drill to which is attached a guide comprising a plurality of telescopically collapsible legs firmly attached to a lower ring adapted in use to be placed against an object to be drilled, said legs also being firmly attached to an upper ring adapted to be firmly attached to the drill head of a portable electric drill there being a plurality of tabs mounted on the upper ring of the guide each tab containing a hole adapted to correspond to the screws which hold the drill body together at least one of the plurality of tabs mounted on the upper ring being slideable in a slit in the upper ring.
Claim 2
Dependent Claim
112 words
A portable electric drill to which is attached a guide comprising a plurality of telescopically collapsible legs firmly attached to a lower ring adapted in use to be placed against an object to be drilled, said legs also being firmly attached to an upper ring adapted to be firmly attached to the drill head of a portable electric drill there being a plurality of tabs mounted on the upper ring of the guide each tab containing a hole adapted to correspond to the screws which hold the drill body together at least one of the plurality of tabs mounted on the upper ring being slideable in a slit in the upper ring.
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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |