Patent US1457637A successfully refreshed from Google Patents.
Patent US3625274A successfully refreshed from Google Patents.
US3625274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable frame for canvases
Assignee: UNIVERSAL MOLDING CO Inc
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Filing: 1970-05-01
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Granted: 1971-12-07
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Expires: 1990-05-01
Abstract
Abstract An adjustable frame, such as for artists canvases and silks, including tubular metal side and end members joined by frictionally retained corners and having spline grooves in the rear faces of the side and end members for the retention of materials stretched over the frame, and means provided at the corners for forcing the end and side members apart to slightly enlarge the dimensions of the frame and tighten the canvas or other material.
Inventors
- 👤 James B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:39
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/18; B44D3/185; A; A47; A47G; A47G1/00; A47G1/06; A47G1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A frame for materials such as artists'' canvases, silks or other fabrics, wherein the improvement comprises: tubular side and end members having relatively movable adjacent ends defining corner spaces, corner inserts comprising angularly disposed arms frictionally fitting in and connecting said adjacent ends and defining closed outer frame edges at the corners of the frame, expander units positioned in the angles of said corner inserts and having edges engaging the adjacent ends of the side and end members, and a screw device carried by each expander and movable into engagement with the juncture of the corner insert arms, the expander unit being movable under action of the screw device to wedge against the adjacent side and end members and move then apart.
Claim 2
Dependent Claim
122 words
A frame for materials such as artists'' canvases, silks or other fabrics, wherein the improvement comprises: tubular side and end members having relatively movable adjacent ends defining corner spaces, corner inserts comprising angularly disposed arms frictionally fitting in and connecting said adjacent ends and defining closed outer frame edges at the corners of the frame, expander units positioned in the angles of said corner inserts and having edges engaging the adjacent ends of the side and end members, and a screw device carried by each expander and movable into engagement with the juncture of the corner insert arms, the expander unit being movable under action of the screw device to wedge against the adjacent side and end members and move then apart.
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |