Patent US2944627A successfully refreshed from Google Patents.
Patent US2813843A successfully refreshed from Google Patents.
US2813843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Product of and process for the vulcanization of butadiene rubbers
Assignee: Occidental Chemical Corp
•
Filing: 1954-04-02
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Granted: 1957-11-19
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Expires: 1974-04-02
Abstract
No abstract record available.
Inventors
- 👤 Alvin F Shepard
- 👤 Joseph T Cardone
- 👤 Albert S Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:36
CPC Classifications
C; C08; C08L; C08L9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A VULCANIZED MATERIAL COMPRISING THE REACTION PRODUCT BETWEEN A VULCANIZABLE 1,3-BUTADIENE RUBBERY POLYMERR AND A VULCANIZING AGENT WHICH IS THE REACTION PRODUCT OF AT LEAST 1.2 MOL OF COMBINED FORMALDEHYDE PER MOL OFF PHENOL SELECTED FROM THE GROUP CONSISTING OF 2.5-DIMETHYLPHENOL, 3,5-DIMETHYLPHENOL, 3-METHYL-5-ETHYLPHENOL AND 3,4-DIMETHYLPHENOL.
Claim 2
Dependent Claim
45 words
A VULCANIZED MATERIAL COMPRISING THE REACTION PRODUCT BETWEEN A VULCANIZABLE 1,3-BUTADIENE RUBBERY POLYMERR AND A VULCANIZING AGENT WHICH IS THE REACTION PRODUCT OF AT LEAST 1.2 MOL OF COMBINED FORMALDEHYDE PER MOL OFF PHENOL SELECTED FROM THE GROUP CONSISTING OF 2.5-DIMETHYLPHENOL, 3,5-DIMETHYLPHENOL, 3-METHYL-5-ETHYLPHENOL AND 3,4-DIMETHYLPHENOL.
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) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |