US2819249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preserved rubber
Assignee: Wyeth Holdings LLC
•
Filing: 1955-03-25
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Granted: 1958-01-07
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Expires: 1975-03-25
Abstract
No abstract record available.
Inventors
- 👤 John C Petropoulos
- 👤 Frank A V Sullivan
- 👤 Arthur C Lindaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:23
CPC Classifications
C; C07; C07C; C07C39/00; C07C39/12; C07C39/17; C08; C08K; C08K5/00; C08K5/04; C08K5/13; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
A METHOD OF REDUCING THE RATE OF OXIDATION OF A VULCANIZED RUBBER COMPOSITION WITH SUBSTANTIALLY NO IN-CREASE IN ITS SUSCEPTIBILITY TO DISCOLORATION IN LIGHT, WHICH COMPRISES COMBINING WITH A VULCANIZABLE RUBBER COMPOSITION CONTAINING A RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER AND A SYNTHETIC BUTADIENE TYPE RUBBER FROM ABOUT 0.25 TO ABOUT 2.5 POUNDS PER 100 POUNDS OF SAID RUBBER OF A COMPOUND OF THE FORMULA:
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) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |