Patent US3723577A successfully refreshed from Google Patents.
US3723577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated elastomer blends
Assignee: 3M Co
•
Filing: 1970-11-05
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Granted: 1973-03-27
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Expires: 1990-11-05
Abstract
Abstract A fluoroelastomer combination is provided having improved processing and handling characteristics. The fluoroelastomer combination comprises at least two highly fluorinated elastomeric polymers, one of said polymers being dispersed throughout a continuous phase of the other of said polymers.
Inventors
- 👤 D Stivers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:23
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L75/00; C08L75/04; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
17 words
A thermally stable, chemical-resistant fluoroelastomer combination in accordance with claim 1, wherein said elastomeric polymers are cured.
Claim 2
Dependent Claim
31 words
A thermally stable, chemical-resistant fluoroelastomer combination in accordance with claim 1, wherein said fluoroelastomer combination contains 3 to 30 weight percent chlorine-containing polymer dispersed throughout a continuous phase of chlorine-free polymer.
Claim 3
Dependent Claim
33 words
A thermally stable, chemical-resistant fluoroelastomer combination in accordance with claim 1, wherein said fluoroelastomer combination contains about 3 to 40 weight percent of chlorine-free polymer dispersed throughout a continuous phase of chlorine-containing polymer.
Claim 4
Dependent Claim
76 words
A thermally stable, chemical-resistant fluoroelastomer combination of improved processing and handling properties comprising at least two highly fluorinated elastomeric polymers, one of said polymers comprising a major amount of an elastomeric vinylidene fluoride/perfluoropropene copolymer, and another of said polymers, which represents about 3 to 97 weight percent of said fluoroelastomer combination, comprising a major amount of an elastomeric vinylidene fluoride/chlorotrifluoroethylene copolymer, wherein one of said polymers is dispersed throughout, and soluble in, another of said polymers.
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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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |