US2537636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of rubber and rubbery polymers and the stabilized products
Assignee: Bridgestone Firestone Inc
•
Filing: 1946-03-09
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Granted: 1951-01-09
•
Expires: 1966-03-09
Abstract
No abstract record available.
Inventors
- 👤 Leland J Kitchen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:13
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
74 words
MATERIALS OF THE CLASS CONSISTING OF RUBBER AND RUBBER-LIKE COPOLYMER OF BUTADIENE AND A MONOMER OF THE CLASS CONSISTING OF STYRENE AND ACRYLONITRILE STABILIZED WITH A SMALL AMOUNT OF AMINE-FREE PHENOL SUBSTITUTED IN THE 2, 4 AND 6 POSITIONS BY A SUBSTITUENT OF THE CLASS CONSISTING OF TERPENYL SUBSTITUENTS AND ALKYL SUBSTITUENTS OF ONE TO FIVE CARBON ATOMS, SAID PHENOL BEING SUBSTITUTED BY AT LEAST ONE TERPENYL SUBSTITUENT AND AT LEAST ONE ALKYL SUBSTITUENT.
Claim 2
Dependent Claim
74 words
MATERIALS OF THE CLASS CONSISTING OF RUBBER AND RUBBER-LIKE COPOLYMER OF BUTADIENE AND A MONOMER OF THE CLASS CONSISTING OF STYRENE AND ACRYLONITRILE STABILIZED WITH A SMALL AMOUNT OF AMINE-FREE PHENOL SUBSTITUTED IN THE 2, 4 AND 6 POSITIONS BY A SUBSTITUENT OF THE CLASS CONSISTING OF TERPENYL SUBSTITUENTS AND ALKYL SUBSTITUENTS OF ONE TO FIVE CARBON ATOMS, SAID PHENOL BEING SUBSTITUTED BY AT LEAST ONE TERPENYL SUBSTITUENT AND AT LEAST ONE ALKYL SUBSTITUENT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |