US3562356A
Expired / Lapsed
US
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Block copolymer blends with certain ethylene-unsaturated ester copolymers
Assignee: Shell USA Inc
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Filing: 1968-11-19
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Granted: 1971-02-09
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Expires: 1988-11-19
Abstract
Abstract COMPOSITIONS EXHIBITING IMPROVED FLEX CRACKING RESISTANCE AND IMPROVED RESISTANCE TO SOLVENT ACTION AND OZONE COMPRISING (A) A BLOCK COPOLYMER OF THE FORMULA A-(B-A)1-5 WHEREIN EACH A IS A POLYMER BLOCK OF A MONOVINYL ARENE AND EACH B IS A POLYMER BLOCK OF A CONJUGATED DIENE, AND HYDROGENATED DERIVATIVES THEREOF, AND (B) IS A COPOLYMER OF ETHYLENE WITH EITHER AN ACRYLATE OR A VINYL CARBOXYLATE.
Inventors
- 👤 David D Nyberg
- 👤 Willis R Hendricks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:31
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/02; C08F297/04; B; B32; B32B; B32B27/00; B32B27/32; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L23/10; C08L53/00; C08L53/02; C08L23/0869; Y; Y10; Y10S; Y10S525/00; Y10S525/94; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917
Claims Analysis
Total Claims: 0
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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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |