US3792005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low molecular weight block copolymers and coating compositions thereof
Assignee: Shell USA Inc
•
Filing: 1972-02-07
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Granted: 1974-02-12
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Expires: 1992-02-07
Abstract
Abstract BLOCK COPOLYMERS HAVING UNEXPECTEDLY HIGH TENSILE STRENGTH AND LOW SOLUTION VISCOSITY COMPRISE POLYMERS HAVING AT LEAST ONE HYDROGENATED CONJUGATED DIENE POLYMER BLOCK HAVING AN AVERGAE MOLECULAR WEIGHT BETWEEN 18,000 AND 35,000, AND AT LEAST TWO MONOALKENYL ARENE POLYMER BLOCKS HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN 4,000 AND 7,500. COATING COMPOSITIONS THEREOF COMPRISE THE ABOVE POLYMERS DISPERSED IN A SOLVENT CARRIER HAVING A HILDEBRAND SOLUBILITY PARAMETER BETWEEN ABOUT 7.5 AND 9.2 (CAL./CM3)1/2.
Inventors
- 👤 J Harlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:16
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/04; C08L; C08L53/00; C08L53/02; Y; Y10; Y10S; Y10S525/00; Y10S525/94
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |