US3038872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber vulcanizate comprising a metallo-carboxylate polymer of a conjugated diene, a butadiene corpolymer and silica, and process for preparing same
Assignee: PPG Industries Inc
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Filing: 1957-11-29
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Granted: 1962-06-12
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Expires: 1977-11-29
Abstract
No abstract record available.
Inventors
- 👤 Ralph F Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:24
CPC Classifications
C; C08; C08L; C08L13/00; C08L21/00; C08L9/00; C08L9/02; C08L9/06; C08K; C08K3/00; C08K3/34; C08K3/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A RUBBER VULCANIZATE HAVING IMPROVED WEAR RESISTANCE WHICH COMPRISES AN ELASTIC, METALLO-CARBOXYLATE POLYMER OF AN OPEN-CHAIN, ALIPHATIC CONJUGATED DIENE, A MEMBER SELECTED FROM THE GROUP CONSISTING OF BUTADIENESTYRENE COPOLYMERS AND ACRYLONITRILE-BUTADIENE COPOLYMER, SAID METALLIC-CARBOXYLATE POLYMER BEING PRESENT IN THE PROPORTION OF 25 TO 95 PARTS BY WEIGHT BASED UPON 100 PARTS BY WEIGHT OF THE COMBINED POLYMERS, AND FROM 20 TO 90 PARTS BY WEIGHT PER 100 PARTS OF THE COMBINED WEIGHT OF SAID POLYMERS OF A FINELY-DIVIDED, HYDRATED, PRECIPITATED SILICA HAVING AN AVERAGE ULTIMATE PARTICLE SIZE BELOW 0.1 MICRON.
Claim 2
Dependent Claim
90 words
A RUBBER VULCANIZATE HAVING IMPROVED WEAR RESISTANCE WHICH COMPRISES AN ELASTIC, METALLO-CARBOXYLATE POLYMER OF AN OPEN-CHAIN, ALIPHATIC CONJUGATED DIENE, A MEMBER SELECTED FROM THE GROUP CONSISTING OF BUTADIENESTYRENE COPOLYMERS AND ACRYLONITRILE-BUTADIENE COPOLYMER, SAID METALLIC-CARBOXYLATE POLYMER BEING PRESENT IN THE PROPORTION OF 25 TO 95 PARTS BY WEIGHT BASED UPON 100 PARTS BY WEIGHT OF THE COMBINED POLYMERS, AND FROM 20 TO 90 PARTS BY WEIGHT PER 100 PARTS OF THE COMBINED WEIGHT OF SAID POLYMERS OF A FINELY-DIVIDED, HYDRATED, PRECIPITATED SILICA HAVING AN AVERAGE ULTIMATE PARTICLE SIZE BELOW 0.1 MICRON.
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) | 1965-06-11 | 1965-12-11 | 1966-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-11 | 1969-12-11 | 1970-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-11 | 1973-12-11 | 1974-06-12 | $7700.00 | Window Closed / Lapsed |