Patent US4056276A successfully refreshed from Google Patents.
Patent US3972510A successfully refreshed from Google Patents.
US3972510A
Expired / Lapsed
US
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Multi-bladed upright for a fence
Assignee: Individual
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Filing: 1974-06-24
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Granted: 1976-08-03
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Expires: 1994-06-24
Abstract
Abstract A plurality of metallic tubular uprights incrementally spaced along the top of a fence or similar structure, are each provided with a plurality of upwardly outwardly flared knife-edge segments to prevent climbing of the fence.
Inventors
- 👤 Duayne D. Dougherty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:10
CPC Classifications
E; E04; E04H; E04H17/00; E04H17/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A multi-bladed upright for use on the top of a fence structure comprising: a. a metallic tubular body mountable adjacent the top of the fence so as to protrude upwardly therefrom; b. a plurality of knife-edge segments at the upper end of said body, each of said segments outwardly flared with respect to said body so as to extend radially angularly upwardly therefrom; and c. a multi-bladed sleeve concentrically mounted on said tubular body, said sleeve axially slidable on said body and rotatable about the axis thereof, said sleeve having a plurality of upwardly outwardly flared knife-edge segments at the top thereof and a plurality of outwardly depending knife-edge segments at the bottom thereof.
Claim 2
Dependent Claim
114 words
A multi-bladed upright for use on the top of a fence structure comprising: a. a metallic tubular body mountable adjacent the top of the fence so as to protrude upwardly therefrom; b. a plurality of knife-edge segments at the upper end of said body, each of said segments outwardly flared with respect to said body so as to extend radially angularly upwardly therefrom; and c. a multi-bladed sleeve concentrically mounted on said tubular body, said sleeve axially slidable on said body and rotatable about the axis thereof, said sleeve having a plurality of upwardly outwardly flared knife-edge segments at the top thereof and a plurality of outwardly depending knife-edge segments at the bottom thereof.
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) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |