US2898321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanization of butadiene rubbers with phenol-aldehyde reaction products and product obtained thereby
Assignee: Hooker Chemical Corp
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Filing: 1955-01-26
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Granted: 1959-08-04
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Expires: 1975-01-26
Abstract
No abstract record available.
Inventors
- 👤 Alvin F Shepard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:54
CPC Classifications
C; C08; C08L; C08L9/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
76 words
A METHOD OF VULCANIZING A VULCANIZABLE RUBBERY 1,3-BUTADIENE POLYMER WHICH COMPRISES THE STEPS OF INTIONATELY ADMIXING IN THE POLYMER A FUSIBLE VULCANIZING AGENT WHICH IS THE REACTION PRODUCT OF AT LEAST 1,2 MOLS OF FORMALDEHYDE PER MOL OF A PHENOL WHICH WHEN REACTED UNDER MILD CONDITIONS WITH AN EXCESS OF FORMALDEHYDE AND IN THE PRESENCE OF AN ALKALINE CATALYST FORMS A FUSIBLE CONDENSATION PRODUCT WHICH REMAINS FUSIBLE UPON HEATING, THE PHENOL BEING OF THE GENERAL FORMULA:
Claim 2
Independent Claim
76 words
A METHOD OF VULCANIZING A VULCANIZABLE RUBBERY 1,3-BUTADIENE POLYMER WHICH COMPRISES THE STEPS OF INTIONATELY ADMIXING IN THE POLYMER A FUSIBLE VULCANIZING AGENT WHICH IS THE REACTION PRODUCT OF AT LEAST 1,2 MOLS OF FORMALDEHYDE PER MOL OF A PHENOL WHICH WHEN REACTED UNDER MILD CONDITIONS WITH AN EXCESS OF FORMALDEHYDE AND IN THE PRESENCE OF AN ALKALINE CATALYST FORMS A FUSIBLE CONDENSATION PRODUCT WHICH REMAINS FUSIBLE UPON HEATING, THE PHENOL BEING OF THE GENERAL FORMULA:
Claim 3
Dependent Claim
10 words
THE VULCANIZED MATERIAL PRODUCED BY THE METHOD OF CLAIM 1.
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) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |