Patent US2928463A successfully refreshed from Google Patents.
Patent US2980552A successfully refreshed from Google Patents.
US2980552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet material for stiffening shoe uppers
Assignee: Stedfast Rubber Co Inc
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Filing: 1956-12-21
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Granted: 1961-04-18
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Expires: 1976-12-21
Abstract
No abstract record available.
Inventors
- 👤 Raymond B Harrison
- 👤 Russell G Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:48
CPC Classifications
A; A43; A43B; A43B13/00; A43B13/02; A43B13/04; A43B13/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
AS AN ARTICLE OF MANUFACTURE AND SALE, A NON-BLOCKING SHOE UPPER STIFFENING SHEET MATERIAL THAT IS PLIABLE AND EXTENSIBLE AND COMPRISES SATURABLE BASE MATERIAL IMPREGNATED WITH VULCANIZABLE RUBBER IN AN UNVULCANIZED CONDITION AND VULCANIZING AGENT IN AMOUNT SUFFICIENT FOR EVENTUAL CURING OF THE VULCANIZABLE RUBBER BUT NO VULCANIZING ACCELERATOR, AND A SURFACE COATING ON AT LEAST ONE SIDE COMPRISING 100 PARTS OF AN UNVULCANIZED RUBBERY COPOLYMER OF BUTADIENE AND ACRYLONITRILE, FROM 10 TO 35 PARTS OF A RESINOUS COPOLYMER OF STYRENE AND BUTADIENE, ABOUT 2.5 TO ABOUT 3.5 PARTS OF SULPHUR, AND ABOUT 20 TO 70 PARTS OF INERT ILLING MATERIAL, BUT NO VULCANIZING ACCELERATOR, SAID PARTS BEING BY WEIGHT, SAID ARTICLE OF MANUFACTURE BEING ADAPTED TO BE ADHESIVELY INCORPORATED INTO THE UPPER OF A SHOE BY AN ADHESIVE CEMENT THAT CONTAINS A MIGRATORY VULCANIZING ACCELERATOR.
Claim 2
Dependent Claim
136 words
AS AN ARTICLE OF MANUFACTURE AND SALE, A NON-BLOCKING SHOE UPPER STIFFENING SHEET MATERIAL THAT IS PLIABLE AND EXTENSIBLE AND COMPRISES SATURABLE BASE MATERIAL IMPREGNATED WITH VULCANIZABLE RUBBER IN AN UNVULCANIZED CONDITION AND VULCANIZING AGENT IN AMOUNT SUFFICIENT FOR EVENTUAL CURING OF THE VULCANIZABLE RUBBER BUT NO VULCANIZING ACCELERATOR, AND A SURFACE COATING ON AT LEAST ONE SIDE COMPRISING 100 PARTS OF AN UNVULCANIZED RUBBERY COPOLYMER OF BUTADIENE AND ACRYLONITRILE, FROM 10 TO 35 PARTS OF A RESINOUS COPOLYMER OF STYRENE AND BUTADIENE, ABOUT 2.5 TO ABOUT 3.5 PARTS OF SULPHUR, AND ABOUT 20 TO 70 PARTS OF INERT ILLING MATERIAL, BUT NO VULCANIZING ACCELERATOR, SAID PARTS BEING BY WEIGHT, SAID ARTICLE OF MANUFACTURE BEING ADAPTED TO BE ADHESIVELY INCORPORATED INTO THE UPPER OF A SHOE BY AN ADHESIVE CEMENT THAT CONTAINS A MIGRATORY VULCANIZING ACCELERATOR.
References Cited (Backward Citations)
US1831689A
Cited
US2431001A
Cited
US2719795A
Cited
US2697048A
Cited
US2617129A
Cited
US2766801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |