US3562355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block copolymer blends with certain polyurethanes or ethylene-unsaturated ester copolymers
Assignee: Shell USA Inc
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Filing: 1968-03-20
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Granted: 1971-02-09
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Expires: 1988-03-20
Abstract
Abstract BLOCK COPOLYMER COMPOSITIONS ARE PROVIDED HAVING SUBSTANTIALLY IMPROVED PHYSICAL PROPERTIES BY INCORPORATION OF CERTAIN POLYESTER URETHANES.
Inventors
- 👤 Geoffrey Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:12
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08L75/00; C08L75/04; C08L75/06; Y; Y10; Y10S; Y10S525/00; Y10S525/932
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 |