US4075288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration-damping material
Assignee: Individual
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Filing: 1974-12-10
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Granted: 1978-02-21
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Expires: 1994-12-10
Abstract
Abstract Polyisoprenes having a minimum of 60% of 1,2- and 3,4-vinyl structure are useful as vibration-damping materials. The polyisoprenes are used individually or as a mixture with inorganic or organic fillers, or in the form of block copolymers.
Inventors
- 👤 Bernard Jacques Graveron
- 👤 Alain Jacques Essel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:41
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/04; C; C08; C08L; C08L9/00; B32B15/00; B32B15/04; B32B15/06; B32B25/16; B32B7/00; B32B7/04; B32B7/12; F; F16; F16F; F16F1/00; F16F1/36; F16F1/3605; B32B2250/00; B32B2250/40; B32B2307/00; B32B2307/50; B32B2307/56; B32B2319/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696; Y10T428/31855; Y10T428/31931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A vibration-damping material which comprises polyisoprene in which the total percentage of 1,2- and 3,4-vinyl structure is 75% and the temperature maximum of tan δ at 110 Hz is in the range between 0° and 23° C, the polyisoprene is in the form of a block copolymer, wherein the block copolymer is of polybutyl methacrylate, polyisoprene and polybutyl methacrylate in the weight proportion 20-60-20.
Claim 2
Dependent Claim
64 words
A vibration-damping material which comprises polyisoprene in which the total percentage of 1,2- and 3,4-vinyl structure is 75% and the temperature maximum of tan δ at 110 Hz is in the range between 0° and 23° C, the polyisoprene is in the form of a block copolymer, wherein the block copolymer is of polybutyl methacrylate, polyisoprene and polybutyl methacrylate in the weight proportion 20-60-20.
References Cited (Backward Citations)
US3105828A
Cited
US3480607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |