US3158663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latex foam stabilized with an alkylated polyether-polythioether glycol
Assignee: Bayer AG
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Filing: 1960-07-27
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Granted: 1964-11-24
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Expires: 1980-07-27
Abstract
No abstract record available.
Inventors
- 👤 Brachel Hanswilli Von
- 👤 Esser Heinz
- 👤 Sinn Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:30
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; C08J; C08J9/00; C08J9/0061; C08L21/00; F; F26; F26B; F26B17/00; F26B17/02; F26B17/08; C08J2307/00; C08J2307/02; C08J2481/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN A PROCESS WHEREIN A NATURAL RUBBER LATEX IS CONVERTED INTO A FOAM AND THE LATTER IS THEN COAGULATED AND VULCANIZED TO A SOLID FOAM RUBBER, THE IMPROVEMENT WHICH COMPRISES STABILIZING THE FOAMED LATEX SO THAT IT DOES NOT COLLAPSE PRIOR TO COAGULATION BY INCORPORATING THEREIN AS A FOAM STABILIZER A POLYSULFONIUM COMPOUND WHICH IS PREPARED BY THE ALKYLATION OF POLYETHER-POLYTHIOETHER GLYCOLS, SAID POLYETHER-POLYTHIOETHER GLYCOLS BEING PREPARED BY REACTING AT A TEMPERATURE OF 140-220*C. IN THE PRESENCE OF A DEHYDRATION CATALYST (1) A POLYETHER GLYCOL OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
89 words
IN A PROCESS WHEREIN A NATURAL RUBBER LATEX IS CONVERTED INTO A FOAM AND THE LATTER IS THEN COAGULATED AND VULCANIZED TO A SOLID FOAM RUBBER, THE IMPROVEMENT WHICH COMPRISES STABILIZING THE FOAMED LATEX SO THAT IT DOES NOT COLLAPSE PRIOR TO COAGULATION BY INCORPORATING THEREIN AS A FOAM STABILIZER A POLYSULFONIUM COMPOUND WHICH IS PREPARED BY THE ALKYLATION OF POLYETHER-POLYTHIOETHER GLYCOLS, SAID POLYETHER-POLYTHIOETHER GLYCOLS BEING PREPARED BY REACTING AT A TEMPERATURE OF 140-220*C. IN THE PRESENCE OF A DEHYDRATION CATALYST (1) A POLYETHER GLYCOL OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2457684A
Cited
US2568866A
Cited
US2563383A
Cited
US2617840A
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US3070584A
Cited
US3087899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |