US3363659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereospecific polymers of butadiene copolymerized with small amounts of a divinyl compound
Assignee: Bridgestone Firestone Inc
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Filing: 1962-07-27
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Granted: 1968-01-16
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Expires: 1982-07-27
Abstract
No abstract record available.
Inventors
- 👤 Keckler Norman Floyd
- 👤 Johnson Bernard Lars
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:10
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; B; B60; B60C; B60C1/00; B60C1/0016; C08F236/06; C08F36/00; C08F36/02; C08F36/04; C08L; C08L23/00; C08L23/02; C08L23/16; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/10; C08L63/00; C08L7/00; C08L9/00; C08K; C08K5/00; C08K5/0008; C08K5/0016; C08K5/0041; C08L25/06; C08L9/06; Y; Y10; Y10S; Y10S152/00; Y10S152/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A BEND OF (A) FROM ABOUT 75 TO ABOUT 25 PARTS BY WEIGHT OF A SYNTHETIC RUBBERY POLYMER HAVING POLYBUTADIENE PORTION WHICH CONTAINS, AS DETERMINED BY INFRARED ANALYSIS, AT LEAST 30% CIS 1,4 STRUCTURE, A TOTAL 1,4 STRUCTURE OF AT LEAST ABOUT 85% AND NOT IN EXCESS OF 12% OF 1,2 STRUCTURE; SAID POLYMER PREPARED FROM MONOMERIC MIXTURES CONSISTING ESSENTIALLY OF BUTADIENE AND FROM ABOUT 0.025 TO ABOUT 0.4 PART BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID BUTADIENE, OF A COMONOMER HAVING AT LEAST TWO TERMINAL =CH2 GROUPS, AND (B) FROM ABOUT 25 TO ABOUT 75 PARTS BY WEIGHT OF A RUBBERY EMULSION COPOLYMER OF BUTADIENE AND STYRENE.
Claim 2
Dependent Claim
110 words
A BEND OF (A) FROM ABOUT 75 TO ABOUT 25 PARTS BY WEIGHT OF A SYNTHETIC RUBBERY POLYMER HAVING POLYBUTADIENE PORTION WHICH CONTAINS, AS DETERMINED BY INFRARED ANALYSIS, AT LEAST 30% CIS 1,4 STRUCTURE, A TOTAL 1,4 STRUCTURE OF AT LEAST ABOUT 85% AND NOT IN EXCESS OF 12% OF 1,2 STRUCTURE; SAID POLYMER PREPARED FROM MONOMERIC MIXTURES CONSISTING ESSENTIALLY OF BUTADIENE AND FROM ABOUT 0.025 TO ABOUT 0.4 PART BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID BUTADIENE, OF A COMONOMER HAVING AT LEAST TWO TERMINAL =CH2 GROUPS, AND (B) FROM ABOUT 25 TO ABOUT 75 PARTS BY WEIGHT OF A RUBBERY EMULSION COPOLYMER OF BUTADIENE AND STYRENE.
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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) | 1971-01-15 | 1971-07-17 | 1972-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-15 | 1975-07-17 | 1976-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-15 | 1979-07-17 | 1980-01-16 | $7700.00 | Window Closed / Lapsed |