Patent US3200142A successfully refreshed from Google Patents.
US3200142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface-active comonomer and method of preparation
Assignee: Individual
•
Filing: 1963-02-01
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Granted: 1965-08-10
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Expires: 1983-02-01
Abstract
No abstract record available.
Inventors
- 👤 Rafael L Bowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:34
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
THE METHOD OF PREPARATION OF A SURFACE ACTIVE COMONOMER WHICH COMPRISES ADMIXING IN THE PRESENCE OF AN AQUEOUS SOLVENT, EQUIMOLAR QUANTITIES OF THE SODIUM SALT OF N-PHENYL GLYCINE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF GLYCIDYL METHACRYLATE AND GLYCIDYL ACRYLATE, SUBJECTING SAID ADMIXTURE, WITH STIRRING TO A TEMPERATURE BETWEEN 23*C. TO 30*C. FOR 2.5 HOURS, AND SEPARATING THE PRECIPITATE FROM THE MOTHER LIQUOR BY ACIDIFICATION TO A PH OF APPROXIMATELY 4.
Claim 2
Independent Claim
73 words
THE METHOD OF PREPARATION OF A SURFACE ACTIVE COMONOMER WHICH COMPRISES ADMIXING IN THE PRESENCE OF AN AQUEOUS SOLVENT, EQUIMOLAR QUANTITIES OF THE SODIUM SALT OF N-PHENYL GLYCINE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF GLYCIDYL METHACRYLATE AND GLYCIDYL ACRYLATE, SUBJECTING SAID ADMIXTURE, WITH STIRRING TO A TEMPERATURE BETWEEN 23*C. TO 30*C. FOR 2.5 HOURS, AND SEPARATING THE PRECIPITATE FROM THE MOTHER LIQUOR BY ACIDIFICATION TO A PH OF APPROXIMATELY 4.
Claim 3
Dependent Claim
6 words
THE PRODUCTS OF THE FOLLOWING FORMULA:
Claim 4
Dependent Claim
6 words
THE PRODUCTS OF THE FOLLOWING FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |