US2581924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of rubbers
Assignee: Bridgestone Firestone Inc
•
Filing: 1948-01-10
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Granted: 1952-01-08
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Expires: 1968-01-10
Abstract
No abstract record available.
Inventors
- 👤 Jr George E P Smith
- 👤 Harry E Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:53
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A RUBBER MATERIAL OF THE CLASS CONSISTING OF NATURAL RUBBER AND RUBBERY COPOLYMERS OF CONJUGATED-DIENE MONOMER AND VINYL MONOMER, WHICH CONTAINS A STABILIZING AMOUNT OF THE STANNOUS SALT OF AN ALICYCLIC CARBOXYLIC ACID.
Claim 2
Dependent Claim
33 words
A RUBBER MATERIAL OF THE CLASS CONSISTING OF NATURAL RUBBER AND RUBBERY COPOLYMERS OF CONJUGATED-DIENE MONOMER AND VINYL MONOMER, WHICH CONTAINS A STABILIZING AMOUNT OF THE STANNOUS SALT OF AN ALICYCLIC CARBOXYLIC ACID.
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) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |