US2653917A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an expanded material and the product resulting therefrom
Assignee: Individual
•
Filing: 1950-06-15
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Granted: 1953-09-29
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Expires: 1970-06-15
Abstract
No abstract record available.
Inventors
- 👤 Hammon Henry George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:22
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/30; C08J2329/00; C08J2329/14; Y; Y10; Y10S; Y10S521/00; Y10S521/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
THE METHOD OF MAKING A SPONGE MATERIAL HAVING INTERCONNECTION PORES WHICH COMPRISES FORMING A SUBSTANTIALLY STABLE DISPERSION OF BUBBLES IN AN AQUEOUS SOLUTION COMPRISING AN ACID IN WHICH THE ACID FUNCTIONAL GROUP IS INORGANIC AND HAVING A DISSOCIATION CONSTANT OF AT LEAST 10-2, A MEMBER OF THE CLASS CONSISTING OF A WATERSOLUBLE HYDROLYZED COPOLYMER OF ALLYIDENE DIETHOXIDE AND VINYL ACETATE, A MIXTURE OF SAID COPOLYMER AND POLYVINYL ALCOHOL, A WATER-SOLUBLE HYDROLYZED COPOLYMER OF ALLYLIDENE DIACETATE AND VINYL ACETATE, A MIXTURE OF SAID COPOLYMER AND POLYVINYL ALCOHOL, EACH OF SAID COPOLYMERS CONTAINING UP TO 15 MOL PERCENT OF THE ALLYLIDENE COMPOUND, AND A MIXTURE OF A DIALDEHYDE AND POLYVINYL ALCOHOL CONTAINING UP TO 15 MOL PERCENT OF SAID DIALDEHYDE, SAID POLYVINYL ALCOHOL CONTAINING LESS THAN 10% RESIDUAL HYDROLYZABLY MATERIAL IN THE MOLECULE, AND FORMALDEHYDE, AND REACTING SAID FORMALDEHYDE AND SAID MEMBER OF SAID CLASS UNTIL APPROXIMATELY 35 TO 80% OF THE HYDROXYL GROUPS OF THE REACTANTS HAVE REACTED.
Claim 2
Independent Claim
157 words
THE METHOD OF MAKING A SPONGE MATERIAL HAVING INTERCONNECTION PORES WHICH COMPRISES FORMING A SUBSTANTIALLY STABLE DISPERSION OF BUBBLES IN AN AQUEOUS SOLUTION COMPRISING AN ACID IN WHICH THE ACID FUNCTIONAL GROUP IS INORGANIC AND HAVING A DISSOCIATION CONSTANT OF AT LEAST 10-2, A MEMBER OF THE CLASS CONSISTING OF A WATERSOLUBLE HYDROLYZED COPOLYMER OF ALLYIDENE DIETHOXIDE AND VINYL ACETATE, A MIXTURE OF SAID COPOLYMER AND POLYVINYL ALCOHOL, A WATER-SOLUBLE HYDROLYZED COPOLYMER OF ALLYLIDENE DIACETATE AND VINYL ACETATE, A MIXTURE OF SAID COPOLYMER AND POLYVINYL ALCOHOL, EACH OF SAID COPOLYMERS CONTAINING UP TO 15 MOL PERCENT OF THE ALLYLIDENE COMPOUND, AND A MIXTURE OF A DIALDEHYDE AND POLYVINYL ALCOHOL CONTAINING UP TO 15 MOL PERCENT OF SAID DIALDEHYDE, SAID POLYVINYL ALCOHOL CONTAINING LESS THAN 10% RESIDUAL HYDROLYZABLY MATERIAL IN THE MOLECULE, AND FORMALDEHYDE, AND REACTING SAID FORMALDEHYDE AND SAID MEMBER OF SAID CLASS UNTIL APPROXIMATELY 35 TO 80% OF THE HYDROXYL GROUPS OF THE REACTANTS HAVE REACTED.
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) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |