Patent US2493798A successfully refreshed from Google Patents.
US2493798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polychloroprene and preparation thereof
Assignee: EIDP Inc
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Filing: 1947-07-08
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Granted: 1950-01-10
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Expires: 1967-07-08
Abstract
No abstract record available.
Inventors
- 👤 Henry H Abernathy
- 👤 George W Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:07
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F36/14; C08F36/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A PROCESS FOR PRODUCING POLYCHLOROPRENE LATICES WHICH ARE PARTICULARLY SUITABLE FOR THE IMPREGNATION OF PAPER, AS BLENDING AGENTS FOR CONVENTIONAL POLYCHLOROPRENE LATICES AND FOR THE PRODUCTION OF FILMS WHICH HAVE A LOW MODULUS OF ELASTICITY AND WHICH ARE RESISTANT TO HARDENING DURING STORAGE, WHICH COMPRISES POLYMERIZING IN AN ALKALINE AQUEOUS EMULSION AND IN THE PRESENCE OF A CHLOROPRENE POLYMERIZATION CATALYST CHLOROPRENE CONTAINING FROM 16 PARTS TO 120 PARTS PER 100 PARTS OF CHLOROPRENE OF A ROSIN ESTER OBTAINED FROM AN ALCOHOL CONTAINING NOT MORE THAN 5 CARBON ATOMS AND NOT MORE THAN 4 HYDROXYL GROUPS, A WATER SOLUBLE SALT OF A ROSIN ACID BEING EMPLOYED AS THE EMULSIFYING AGENT IN AN AMOUNT IN PARTS BY WEIGHT OF NOT LESS THAN ONE-TWENTIETH OF THE NUMBER OF PARTS OF ROSIN ESTER PRESENT IN THE LATEX PER 100 PARTS OF CHLOROPRENE PLUS 3.5 PARTS AND NOT GREATER THAN 15% OF THE TOTAL WEIGHT OF THE CHLOROPRENE AND ROSIN ESTER EMPLOYED.
Claim 2
Dependent Claim
157 words
A PROCESS FOR PRODUCING POLYCHLOROPRENE LATICES WHICH ARE PARTICULARLY SUITABLE FOR THE IMPREGNATION OF PAPER, AS BLENDING AGENTS FOR CONVENTIONAL POLYCHLOROPRENE LATICES AND FOR THE PRODUCTION OF FILMS WHICH HAVE A LOW MODULUS OF ELASTICITY AND WHICH ARE RESISTANT TO HARDENING DURING STORAGE, WHICH COMPRISES POLYMERIZING IN AN ALKALINE AQUEOUS EMULSION AND IN THE PRESENCE OF A CHLOROPRENE POLYMERIZATION CATALYST CHLOROPRENE CONTAINING FROM 16 PARTS TO 120 PARTS PER 100 PARTS OF CHLOROPRENE OF A ROSIN ESTER OBTAINED FROM AN ALCOHOL CONTAINING NOT MORE THAN 5 CARBON ATOMS AND NOT MORE THAN 4 HYDROXYL GROUPS, A WATER SOLUBLE SALT OF A ROSIN ACID BEING EMPLOYED AS THE EMULSIFYING AGENT IN AN AMOUNT IN PARTS BY WEIGHT OF NOT LESS THAN ONE-TWENTIETH OF THE NUMBER OF PARTS OF ROSIN ESTER PRESENT IN THE LATEX PER 100 PARTS OF CHLOROPRENE PLUS 3.5 PARTS AND NOT GREATER THAN 15% OF THE TOTAL WEIGHT OF THE CHLOROPRENE AND ROSIN ESTER EMPLOYED.
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) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |