US3485894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interpolymers of vinyl arenes and certain block copolymers and process for their preparation
Assignee: Shell USA Inc
•
Filing: 1964-01-20
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Granted: 1969-12-23
•
Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 Lee M Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:05
CPC Classifications
C; C08; C08F; C08F287/00; C08L; C08L25/00; C08L53/00; C08L53/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A SOLID THERMOPLASTIC INTERPOLYMER OF FROM ABOUT 99 TO 80 PARTS OF WEIGHT OF CONDENSED MONO VINYLARENE UNITS AND FROM ABOUT 1 TO 20 PARTS BY WEIGHT OF A BLOCK COPOLYMER HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
35 words
A SOLID THERMOPLASTIC INTERPOLYMER OF FROM ABOUT 99 TO 80 PARTS OF WEIGHT OF CONDENSED MONO VINYLARENE UNITS AND FROM ABOUT 1 TO 20 PARTS BY WEIGHT OF A BLOCK COPOLYMER HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
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Cited
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Cited
US3243481A
Cited
US3264374A
Cited
US3264375A
Cited
US3251905A
Cited
US3231635A
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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) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |