US3311601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process coagulating chloroprene polymers from a latex
Assignee: EIDP Inc
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Filing: 1963-08-02
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Granted: 1967-03-28
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Expires: 1983-08-02
Abstract
No abstract record available.
Inventors
- 👤 Conley James Batts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:14
CPC Classifications
C; C08; C08C; C08C1/00; C08C1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A PROCESS FOR THE ISOLATION OF CHLOROPRENE POLYMER, WHICH POLYMER EXHIBITS LOW TEMPERATURE BRITTLENESS, WHICH PROCESS COMPRISES FREEZING A LAYER OF AN AQUEOUS LATEX EMULSION OF SAID POLYMER ON A ROATATING DRUM SURFACE, REMOVING THE RESULTING FROZEN LAYER FROM SAID DRUM, THAWING TO MELT THE ICE AND WASHING AND DRYING THE THIN LAYER OF COAGULATED POLYMER WHICH RESULTS; THE IMPROVEMENT OF INCORPORATING IN SAID LATEX EMULSION BEFORE FREEZING FROM ABOUT 1 TO 20 PARTS BY WEIGHT, PER 100 PARTS OF POLYMER, OF A VOLATILE LIQUID SELECTED FROM THE GROUP CONSISTING OF AROMATIC HYDROCARBONS, KETONES, AND NITRILES, SAID VOLATILE LIQUID HAVING A BOILING POINT IN THE RANGE OF FROM ABOUT 56*C. TO 150*C.
Claim 2
Dependent Claim
113 words
IN A PROCESS FOR THE ISOLATION OF CHLOROPRENE POLYMER, WHICH POLYMER EXHIBITS LOW TEMPERATURE BRITTLENESS, WHICH PROCESS COMPRISES FREEZING A LAYER OF AN AQUEOUS LATEX EMULSION OF SAID POLYMER ON A ROATATING DRUM SURFACE, REMOVING THE RESULTING FROZEN LAYER FROM SAID DRUM, THAWING TO MELT THE ICE AND WASHING AND DRYING THE THIN LAYER OF COAGULATED POLYMER WHICH RESULTS; THE IMPROVEMENT OF INCORPORATING IN SAID LATEX EMULSION BEFORE FREEZING FROM ABOUT 1 TO 20 PARTS BY WEIGHT, PER 100 PARTS OF POLYMER, OF A VOLATILE LIQUID SELECTED FROM THE GROUP CONSISTING OF AROMATIC HYDROCARBONS, KETONES, AND NITRILES, SAID VOLATILE LIQUID HAVING A BOILING POINT IN THE RANGE OF FROM ABOUT 56*C. TO 150*C.
References Cited (Backward Citations)
US2187146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |