Patent US3955677A successfully refreshed from Google Patents.
US3955677A
Expired / Lapsed
US
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Cornerboard protector
Assignee: Cornerboard Inc
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Filing: 1974-06-03
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Granted: 1976-05-11
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Expires: 1994-06-03
Abstract
Abstract Cornerboard protector comprises laminated cardboard or paperboard with embedded reinforcement strip, which is bent at a right angle along its length, the reinforcement strip being embedded only in the unbent portion of the strip. A V-cut in the bent portion and extending into the unbent portion with its apex terminated just short of the reinforcement strip provides a mitered corner about which the laminate is folded to form a neat and strong corner protector.
Inventors
- 👤 David S. Collingwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:36
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/02; B65D81/05; B65D81/053; B65D81/055; B65D81/056; B65D2581/00; B65D2581/02; B65D2581/05; B65D2581/051; B65D2581/052; B65D2581/053; Y; Y10; Y10S; Y10S229/00; Y10S229/93; Y10S229/931; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1026
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
145 words
Corner protector comprising a strip of resilient, laminated cardboard having an inner and an outer surface and a flexible reinforcement strip along the length thereof embedded between the laminae of said strip near the outer surface of said laminated cardboard said strip being bent all of said laminae toward the inner surface thereof in a line along its length, said cardboard being cut, on the inner surface thereof in the unbent portion thereof through substantially all of said laminae to said reinforcement strip near the outer surface thereof, said cut being made along a line at an angle to the length of said strip, the sides of said cut forming a V-shape with the apex pointing away from said inner surface, said bent portion being cut through all of said laminae along lines continuous with the sides of said V-shaped cut in said unbent portion.
Claim 2
Dependent Claim
145 words
Corner protector comprising a strip of resilient, laminated cardboard having an inner and an outer surface and a flexible reinforcement strip along the length thereof embedded between the laminae of said strip near the outer surface of said laminated cardboard said strip being bent all of said laminae toward the inner surface thereof in a line along its length, said cardboard being cut, on the inner surface thereof in the unbent portion thereof through substantially all of said laminae to said reinforcement strip near the outer surface thereof, said cut being made along a line at an angle to the length of said strip, the sides of said cut forming a V-shape with the apex pointing away from said inner surface, said bent portion being cut through all of said laminae along lines continuous with the sides of said V-shaped cut in said unbent portion.
Claim 3
Dependent Claim
31 words
Corner protector, as recited in claim 1, wherein said reinfocement strip consists of a series of high strength continuous filaments running in a ribbon, side by side, along the length thereof.
Claim 4
Dependent Claim
14 words
Corner protector, as recited in claim 1, wherein said filaments are composed of rayon.
Claim 5
Dependent Claim
30 words
Corner protector, as recited in claim 1, wherein said reinforcement strip is narrower than the unbent portion of said laminated cardboard and runs along the length of said unbent portion.
Claim 6
Dependent Claim
22 words
Corner protector, as recited in claim 1, wherein said protector is folded along the length of said cut in said unbent portion.
Claim 7
Dependent Claim
57 words
Corner protector, as recited in claim 1, wherein the sides of said cut form an angle of 90° therebetween, said protector adapted to be folded along the length of said cut in said unbent portion to form a right angle between the lengths of said protector on either side of said cut in the unbent portion thereof.
References Cited (Backward Citations)
US2324031A
Cited
US2610936A
Cited
US2746667A
Cited
US2896833A
Cited
US2969906A
Cited
US3433354A
Cited
US3684636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |