Patent US3365416A successfully refreshed from Google Patents.
US3365416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber composition, particularly intended for treads of pneumatic tires
Assignee: Pirelli and C SpA
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Filing: 1964-02-04
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Granted: 1968-01-23
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Expires: 1984-02-04
Abstract
No abstract record available.
Inventors
- 👤 Vittorelli Sergio
- 👤 Canonici Oberto
- 👤 Morando Angelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:17
CPC Classifications
C; C08; C08L; C08L9/00; B; B60; B60C; B60C1/00; B60C1/0016; C08L9/06; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A RUBBER COMPOSITION BASES ON A MIXTURE OF ELASTOMERS COMPRISING (1) FROM 10 TO 90 PARTS BY WEIGHT OF POLYBUTADIENE OBTAINED BY ADDITION OF 1,3-BUTADIENE AND CONTAINING MONOMERIC UNITS OF CIS 1,4, TRANS 1,4 AND 1,2-ADDITION, IN WHICH THE CIS 1,4-ADDITION MONOMERIC UNITS ARE PRESENT IN AN AMOUNT OF AT LEAST 30% BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE POLYMER AND (2) FROM 90 TO 10 PARTS BY WEIGHT OF A BUTADIENE-STYRENE COPOLYMER EXTENDED WITH MINERAL OIL, THE RATIO BY WEIGHT BETWEEN THE TWO TYPES OF MONOMERIC UNITS OF SAID COPOLYMER BEING 60:40 AND THE OIL BEING INCORPORATED N AN AMOUNT OF AT LEAST 15% BASED ON THE TOTAL WEIGHT OF THE COPOLYMER, THE TOTAL OF THE PARTS BY WEIGHT OF THE ELASTOMERIC COMPONENTS OF THE MIXTURE BEING EQUAL TO 100.
Claim 2
Dependent Claim
133 words
A RUBBER COMPOSITION BASES ON A MIXTURE OF ELASTOMERS COMPRISING (1) FROM 10 TO 90 PARTS BY WEIGHT OF POLYBUTADIENE OBTAINED BY ADDITION OF 1,3-BUTADIENE AND CONTAINING MONOMERIC UNITS OF CIS 1,4, TRANS 1,4 AND 1,2-ADDITION, IN WHICH THE CIS 1,4-ADDITION MONOMERIC UNITS ARE PRESENT IN AN AMOUNT OF AT LEAST 30% BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE POLYMER AND (2) FROM 90 TO 10 PARTS BY WEIGHT OF A BUTADIENE-STYRENE COPOLYMER EXTENDED WITH MINERAL OIL, THE RATIO BY WEIGHT BETWEEN THE TWO TYPES OF MONOMERIC UNITS OF SAID COPOLYMER BEING 60:40 AND THE OIL BEING INCORPORATED N AN AMOUNT OF AT LEAST 15% BASED ON THE TOTAL WEIGHT OF THE COPOLYMER, THE TOTAL OF THE PARTS BY WEIGHT OF THE ELASTOMERIC COMPONENTS OF THE MIXTURE BEING EQUAL TO 100.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |