US2858282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making latex sponge rubber
Assignee: Uniroyal Inc
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Filing: 1956-08-23
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Granted: 1958-10-28
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Expires: 1976-08-23
Abstract
No abstract record available.
Inventors
- 👤 James T Fairclough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:01
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08L; C08L21/00; C08J2321/00; C08J2321/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE METHOD OF MAKING LATEX SPONGE RUBBER WHICH COMPRISES SHAPING AN ALKALINE RUBBER LATEX COMPOSITION WHICH CONTAINS A CHEMICAL SELECTED FROM THE GROUP CONSISTING OF AZO-DICARBONAMIDE, BENZENESULFONYLHYDRAZIDE, P,P-OXY-BIS(BENZENESULFONYLHYDRAZIDE), P,P''-THIO-BIS(BENBIS(BENZENESULFONYLHYDRAZIDE), AND P,P''-THIO-BIS(BENZENESULFONYLHYDRAZIDE), AND HEATING THE LATEX WHEREBY THE LATEX IS FROTHED BY EVOLUTION OF NITROGEN AND THE FROTH IS GELLED BY REDUCTION OF THE PH OF THE LATEX, SAID LATEX BEING SELECTED FROM THE GROUP COINSISTING OF NATURAL RUBBER LATEX AND BUTADIENE POLYMER SYNTHETIC RUBBER LATICES.
Claim 2
Independent Claim
75 words
THE METHOD OF MAKING LATEX SPONGE RUBBER WHICH COMPRISES SHAPING AN ALKALINE RUBBER LATEX COMPOSITION WHICH CONTAINS A CHEMICAL SELECTED FROM THE GROUP CONSISTING OF AZO-DICARBONAMIDE, BENZENESULFONYLHYDRAZIDE, P,P-OXY-BIS(BENZENESULFONYLHYDRAZIDE), P,P''-THIO-BIS(BENBIS(BENZENESULFONYLHYDRAZIDE), AND P,P''-THIO-BIS(BENZENESULFONYLHYDRAZIDE), AND HEATING THE LATEX WHEREBY THE LATEX IS FROTHED BY EVOLUTION OF NITROGEN AND THE FROTH IS GELLED BY REDUCTION OF THE PH OF THE LATEX, SAID LATEX BEING SELECTED FROM THE GROUP COINSISTING OF NATURAL RUBBER LATEX AND BUTADIENE POLYMER SYNTHETIC RUBBER LATICES.
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) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |