Patent US2670342A successfully refreshed from Google Patents.
US2670342A
Expired / Lapsed
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Process for vulcanizing polychloroprene
Assignee: EIDP Inc
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Filing: 1952-02-07
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Granted: 1954-02-23
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Expires: 1972-02-07
Abstract
No abstract record available.
Inventors
- 👤 John J Verbanc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:54
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
THE PROCESS OF VULCANIZING CHLOROPRENE POLYMERS WHICH COMPRISES INCORPORATING IN THE CHLOROPRENE POLYMER STOCK, CONTAINIG AT LEAST 1% OF ZINC OXIDE, FROM 0.5% TO 3.0% OF A MANNICH BASE OF THE GROUP CONSISTING OF PHENOLS AND NAPHTHOLS CONTAINING FROM ONE TO THREE DIMETHYLAMINOMETHYL GROUPS, AND HEATING AT VULCANIZING TEMPERATURES TO EFFECT CURING OF THE POLYMER.
Claim 2
Dependent Claim
55 words
THE PROCESS OF VULCANIZING CHLOROPRENE POLYMERS WHICH COMPRISES INCORPORATING IN THE CHLOROPRENE POLYMER STOCK, CONTAINIG AT LEAST 1% OF ZINC OXIDE, FROM 0.5% TO 3.0% OF A MANNICH BASE OF THE GROUP CONSISTING OF PHENOLS AND NAPHTHOLS CONTAINING FROM ONE TO THREE DIMETHYLAMINOMETHYL GROUPS, AND HEATING AT VULCANIZING TEMPERATURES TO EFFECT CURING OF THE POLYMER.
References Cited (Backward Citations)
US2117591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |