US2605252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of rubber materials with cresylic acid derivatives
Assignee: Bridgestone Firestone Inc
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Filing: 1951-07-28
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Granted: 1952-07-29
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Expires: 1971-07-28
Abstract
No abstract record available.
Inventors
- 👤 Leland J Kitchen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:37
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
PROCESS OF STABILIZING A VULCANIZED RUBBER COMPOSITION WITHOUT SUBSTANTIALLY INCREASING ITS SUSCEPTIBILITY TO DISCOLORATION IN LIGHT, WHICH COMPRISES ADDING TO AN UNVULCANIZED RUBBER A RELATIVELY SMALL AMOUNT OF THE REACTION PRODUCT OF AN ALKYL HALIDE AND AN OLEFIN-ALKYLATED CRESYLIC ACID THE ALKYL HALIDE CONTAINING 3 TO 8 CARBON ATOMS IN THE MOLECULE AND THE OLEFIN CONTAINING 3 TO 8 CARBON ATOMS IN THE MOLECULE, AND THEN VULCANIZING THE RUBBER.
Claim 2
Dependent Claim
69 words
PROCESS OF STABILIZING A VULCANIZED RUBBER COMPOSITION WITHOUT SUBSTANTIALLY INCREASING ITS SUSCEPTIBILITY TO DISCOLORATION IN LIGHT, WHICH COMPRISES ADDING TO AN UNVULCANIZED RUBBER A RELATIVELY SMALL AMOUNT OF THE REACTION PRODUCT OF AN ALKYL HALIDE AND AN OLEFIN-ALKYLATED CRESYLIC ACID THE ALKYL HALIDE CONTAINING 3 TO 8 CARBON ATOMS IN THE MOLECULE AND THE OLEFIN CONTAINING 3 TO 8 CARBON ATOMS IN THE MOLECULE, AND THEN VULCANIZING THE RUBBER.
References Cited (Backward Citations)
US2471887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |