US2797204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanization of butadiene rubbers with the reaction product of formaldehyde and 3, 4, 5-trialkylphenol
Assignee: Occidental Chemical Corp
•
Filing: 1954-07-20
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Granted: 1957-06-25
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Expires: 1974-07-20
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
2026-10-29 13:00
CPC Classifications
C; C08; C08L; C08L21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A VULCANIZED MATERIAL COMPRISING THE REACTION PRODUCT BETWEEN A 1,3-BUTADIENE POLYMER AND A VULCANIZING AGENT WHICH IS REACTION PRODUCT OF AT LEAST 1.2 MOL OF FORMALDEHYDE PER MOL OF PHENOL OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
34 words
A VULCANIZED MATERIAL COMPRISING THE REACTION PRODUCT BETWEEN A 1,3-BUTADIENE POLYMER AND A VULCANIZING AGENT WHICH IS REACTION PRODUCT OF AT LEAST 1.2 MOL OF FORMALDEHYDE PER MOL OF PHENOL OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2165380A
Cited
US2649431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |