Patent US2805962A successfully refreshed from Google Patents.
US2805962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnation of sheet materials with synthetic resin latices
Assignee: Celastic Corp
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Filing: 1954-07-22
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Granted: 1957-09-10
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Expires: 1974-07-22
Abstract
No abstract record available.
Inventors
- 👤 Hendricks Charles Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:21
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/693; C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08L; C08L57/00; D06M11/00; D06M11/68; D06M11/70; D06M11/71; D06M15/19; D06M15/21; D06M15/227; D06M15/233; D06M15/244; D06M15/263; D06M15/267; D06M15/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR PREPARING SHOE STIFFENERS CONSISTING ESSENTIALLY OF DIPPING A COTTON FLANNEL FABRIC INTO AN AQUEOUS LATEX CONTAINING (1) 20% TO 60% BY WEIGHT OF RESIN SOLIDS COMPRISING ABOUT 75% OF POLYSTYRENE AND ABOUT 25% OF AN 80/20 COPOLYMER OF STYRENE AND BUTADIENE AND (2) 0.10% TO 3.0% BY WEIGHT OF AN ANIONIC SURFACE-ACTIVE ORGANIC COMPOUND FROM THE GROUP CONSISTING OF ALKALI METAL ALKYL AND ALKALI METAL ALKYL ARYL-SULFATES, -SULFONATES, -PHOSPHATES, AND -PHOSPHONATES; DIPPING THE LATEX IMPREGNATED FLANNEL INTO AN AQUEOUS SOLUTION OF ALUMINUM SULFATE, AND THEREAFTER DRYING THE TWICE-DIPPED FLANNEL AND RECOVERING A DRY, FLEXIBLE SHOE STIFFENER, CONTAINING AT LEAST 50% BY WEIGHT OF SAID RESIN SOLIDS, AND CAPABLE OF BEING STIFFENED BY THE ACTION OF A SOLVENT FOR SAID RESIN SOLIDS.
Claim 2
Dependent Claim
124 words
A PROCESS FOR PREPARING SHOE STIFFENERS CONSISTING ESSENTIALLY OF DIPPING A COTTON FLANNEL FABRIC INTO AN AQUEOUS LATEX CONTAINING (1) 20% TO 60% BY WEIGHT OF RESIN SOLIDS COMPRISING ABOUT 75% OF POLYSTYRENE AND ABOUT 25% OF AN 80/20 COPOLYMER OF STYRENE AND BUTADIENE AND (2) 0.10% TO 3.0% BY WEIGHT OF AN ANIONIC SURFACE-ACTIVE ORGANIC COMPOUND FROM THE GROUP CONSISTING OF ALKALI METAL ALKYL AND ALKALI METAL ALKYL ARYL-SULFATES, -SULFONATES, -PHOSPHATES, AND -PHOSPHONATES; DIPPING THE LATEX IMPREGNATED FLANNEL INTO AN AQUEOUS SOLUTION OF ALUMINUM SULFATE, AND THEREAFTER DRYING THE TWICE-DIPPED FLANNEL AND RECOVERING A DRY, FLEXIBLE SHOE STIFFENER, CONTAINING AT LEAST 50% BY WEIGHT OF SAID RESIN SOLIDS, AND CAPABLE OF BEING STIFFENED BY THE ACTION OF A SOLVENT FOR SAID RESIN SOLIDS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |