US2538355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2, 2'-alkylene bis-4, 6-dialkyl phenols as rubber stabilizers
Assignee: Wyeth Holdings LLC
•
Filing: 1949-07-25
•
Granted: 1951-01-16
•
Expires: 1969-07-25
Abstract
No abstract record available.
Inventors
- 👤 Arnold R Davis
- 👤 Frank A V Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:49
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
48 words
A METHOD OF REDUCING THE NORMAL RATE OF OXIDATION OF A VULCANIZED RUBBER COMPOSITION WITH SUBSTANTIALLY NO INCREASE IN ITS SUSCEPTIBILITY TO DISCOLORATION IN LIGHT, WHICH COMPRISES COMBINING WITH A VULCANIZABLE RUBBER COMPOSITION FROM ABOUT 0.25-2.5 POUNDS PER 100 POUNDS OF RUBBER OF A COMPOUND OF THE FORMULA
Claim 2
Independent Claim
48 words
A METHOD OF REDUCING THE NORMAL RATE OF OXIDATION OF A VULCANIZED RUBBER COMPOSITION WITH SUBSTANTIALLY NO INCREASE IN ITS SUSCEPTIBILITY TO DISCOLORATION IN LIGHT, WHICH COMPRISES COMBINING WITH A VULCANIZABLE RUBBER COMPOSITION FROM ABOUT 0.25-2.5 POUNDS PER 100 POUNDS OF RUBBER OF A COMPOUND OF THE FORMULA
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Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-15 | 1954-07-17 | 1955-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-15 | 1958-07-17 | 1959-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-15 | 1962-07-17 | 1963-01-16 | $7700.00 | Window Closed / Lapsed |