US3781232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft copolymers having branches which are alternating copolymers,and processes therefor
Assignee: GAYLORD RES INST INC US
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Filing: 1970-08-25
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Granted: 1973-12-25
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Expires: 1990-08-25
Abstract
Abstract A METHOD FOR PREPARING NOVEL GRAFT COPOLYMERS IN WHICH THE BRANCHES ARE ALTERNATING COPOLYMERS, BY REACTING TWO COMONOMERS, UNDER CONDITIONS WHEREBY ALTERNATING COPOLYMERS ARE FORMED, IN THE PRESENCE OF AN AGENT CAPABLE OF FORMING A COMPLEX WITH ONE OF THE MONOMERS AND A PREFORMED POLYMER HAVING ACTIVE HYDROGEN ATOMS.
Inventors
- 👤 N Gaylord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:25
CPC Classifications
C; C08; C08F; C08F291/00
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |