Patent US2640087A successfully refreshed from Google Patents.
US2640087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of latex foam sponge
Assignee: Uniroyal Inc
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Filing: 1950-05-10
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Granted: 1953-05-26
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Expires: 1970-05-10
Abstract
No abstract record available.
Inventors
- 👤 Robert O Borton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:53
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
THE METHOD OF MAKING SPONGE RUBBER WHICH COMPRISES PREPARING A FLUID FOAM OF A RUBBER LATEX SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER LATEX AND MIXTURES OF A MAJOR PROPORTION OF A NATURAL RUBBER LATEX AND A MINOR PROPORTION OF A SYNTHETIC RUBBER LATEX WHICH IS AN AQUEOUS EMULSION POLYMERIZATE OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF BUTADIENE-1,3 HYDROCARBONS AND MIXTURES OF BUTADIENE-1,3 HYDROCARBONS WITH OTHER POLYMERIZABLE COMPOUNDS CONTAINING A CH2=C< GROUP AND CAPABLE OF FORMING COPOLYMERS WITH BUTADIENE-1,3 HYDROCARBONS, SAID LATEX CONTAINING 1 TO 5 PARTS OF WATER-SOLUBLE SOAP OF SOAP-FORMING MONOCARBOXYLIC ACID AND 0.2 TO 1.8 PARTS OF ALKALI-METAL SILICATE, AND ADDING TO THE THUS PREPARED FOAM 0.5 TO 4 PARTS OF ALKALI-METAL SILICOFLUORIDE PER 100 PARTS OF LATEX SOLIDS, THE SAID ALKALI-METAL SILICATE BEING IN AMOUNT LESS THAN THE SAID ALKALI-METAL SILICOFLUORIDE, SHAPING THE FOAM BEFORE GELLING TAKES PLACE, PERMITTING THE FOAM TO GEL, AND VULCANIZING TO FORM SPONGE RUBBER.
Claim 2
Independent Claim
155 words
THE METHOD OF MAKING SPONGE RUBBER WHICH COMPRISES PREPARING A FLUID FOAM OF A RUBBER LATEX SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER LATEX AND MIXTURES OF A MAJOR PROPORTION OF A NATURAL RUBBER LATEX AND A MINOR PROPORTION OF A SYNTHETIC RUBBER LATEX WHICH IS AN AQUEOUS EMULSION POLYMERIZATE OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF BUTADIENE-1,3 HYDROCARBONS AND MIXTURES OF BUTADIENE-1,3 HYDROCARBONS WITH OTHER POLYMERIZABLE COMPOUNDS CONTAINING A CH2=C< GROUP AND CAPABLE OF FORMING COPOLYMERS WITH BUTADIENE-1,3 HYDROCARBONS, SAID LATEX CONTAINING 1 TO 5 PARTS OF WATER-SOLUBLE SOAP OF SOAP-FORMING MONOCARBOXYLIC ACID AND 0.2 TO 1.8 PARTS OF ALKALI-METAL SILICATE, AND ADDING TO THE THUS PREPARED FOAM 0.5 TO 4 PARTS OF ALKALI-METAL SILICOFLUORIDE PER 100 PARTS OF LATEX SOLIDS, THE SAID ALKALI-METAL SILICATE BEING IN AMOUNT LESS THAN THE SAID ALKALI-METAL SILICOFLUORIDE, SHAPING THE FOAM BEFORE GELLING TAKES PLACE, PERMITTING THE FOAM TO GEL, AND VULCANIZING TO FORM SPONGE RUBBER.
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) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |