US3826787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regular alternating copolymers of styrene and imidazolines and their derivatives
Assignee: Wyeth Holdings LLC
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Filing: 1973-09-21
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Granted: 1974-07-30
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Expires: 1993-09-21
Abstract
Abstract COMPLETELY ALTERNATING (1:1) COPOLYMERS OF STYRENE AND VARIOUS IMIDAZOLINES, THEIR SALT DERIVATIVES AND METHODS OF TREATING AQUEOUS SUSPENSIONS OF WATER-INSOLUBLE, SOLID MATERIALS THEREWITH, ARE DISCLOSED.
Inventors
- 👤 R Capozza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:07
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08F; C08F8/00; Y; Y10; Y10S; Y10S526/00; Y10S526/923
Claims Analysis
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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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |