US4472954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key
Assignee: Taisei Kogyo KK
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Filing: 1982-07-27
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Granted: 1984-09-25
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Expires: 2002-07-27
Abstract
Abstract This invention relates to a key capable of being distinguished easily from any one of a plurality of keys for different uses carried therewith; held between the fingers conveniently during locking and unlocking operations; and determined easily in advance as to the direction, in which the key is to be inserted into a key hole.
Inventors
- 👤 Hirakazu Kichise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:46
CPC Classifications
E; E05; E05B; E05B19/00; E05B19/24; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/778; Y10T70/7791; Y10T70/7876
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
114 words
A key comprising a holding portion having opposed faces and an insertion portion extending therefrom for insertion in a keyhole of a lock, an elongated slot in an upper section of said holding portion and remote from said insertion portion, said slot extending through the holding portion from one face to the other and defining an opening for mounting the key on a key holder, overlays of colored synthetic resin formed symmetrically on said opposed faces of the holding portion, each overlay having a recess defining a round marking region between said slot and the insertion portion of the key, said recess providing a finger grip to assist gripping the key by the user.
Claim 2
Dependent Claim
114 words
A key comprising a holding portion having opposed faces and an insertion portion extending therefrom for insertion in a keyhole of a lock, an elongated slot in an upper section of said holding portion and remote from said insertion portion, said slot extending through the holding portion from one face to the other and defining an opening for mounting the key on a key holder, overlays of colored synthetic resin formed symmetrically on said opposed faces of the holding portion, each overlay having a recess defining a round marking region between said slot and the insertion portion of the key, said recess providing a finger grip to assist gripping the key by the user.
Claim 3
Dependent Claim
32 words
A key according to claim 1 wherein said round marking regions are a surface of a body portion of the key, and surfaces of said overlays curve inward toward said marking regions.
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) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |