Patent US3993336A successfully refreshed from Google Patents.
US3993336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guard to prevent opening of sliding doors
Assignee: Individual
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Filing: 1975-08-25
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Granted: 1976-11-23
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Expires: 1995-08-25
Abstract
Abstract A guard to prevent unauthorized opening of sliding doors and similar closures, comprising a longitudinal member having a major portion and a minor portion hinged together end-to-end. The guard when fully extended, is positioned normal to the direction of opening of the door, and extends between the jamb and the edge of the door and preferably resting on the floor. When the door is to be partially opened for ventilation, the minor portion is hinged 180° so as to overlap the major portion. The resultant shortened guard then permits the door to be opened only an amount equal to the length of the minor portion.
Inventors
- 👤 Genevieve O. Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:04
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/08; E05B65/0888; Y; Y10; Y10S; Y10S292/00; Y10S292/46; Y10T; Y10T292/00; Y10T292/28; Y10T292/282; Y10T292/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
77 words
A guard to prevent the opening of a sliding door, and to optionally permit partial opening of said door, said guard comprising a longitudinal major portion, and a longitudinal minor portion, said portions positioned in an end-to-end abutting relationship, said portions terminating in cap members at the abutting ends thereof, a hinge integrally connecting the mutually-opposed cap members to permit pivoting of said minor portion 180° relative to said major portion, and parallel to said major portion.
Claim 2
Dependent Claim
77 words
A guard to prevent the opening of a sliding door, and to optionally permit partial opening of said door, said guard comprising a longitudinal major portion, and a longitudinal minor portion, said portions positioned in an end-to-end abutting relationship, said portions terminating in cap members at the abutting ends thereof, a hinge integrally connecting the mutually-opposed cap members to permit pivoting of said minor portion 180° relative to said major portion, and parallel to said major portion.
Claim 3
Dependent Claim
22 words
A guard as set forth in claim 1, in which said major and minor portions and said caps are of non-metallic materal.
Claim 4
Dependent Claim
23 words
A guard as set forth in claim 1, in which said hinge and said mutually-opposed caps comprise a unitary molding of non-metallic material.
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) | 1979-11-23 | 1980-05-24 | 1980-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-23 | 1984-05-24 | 1984-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-23 | 1988-05-24 | 1988-11-23 | $7700.00 | Window Closed / Lapsed |