US3728314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical composition for viscosity control and film forming materials
Assignee: Hydrophilics International Inc
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Filing: 1971-05-03
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Granted: 1973-04-17
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Expires: 1991-05-03
Abstract
Abstract A HYDROPHILIC COPOLYMER IS FORMED THROUGH THE BULK COPOLYMERIZATION OF METHYL METHACRYLATE, AN ACRYLIC ACID, AND AN ACRYLATE PLASTICIZE, IN PARTICULAR AMOUNTS, FOLLOWED BY TREATING OF THE FORMED COPOLYMER, IN POWDER FORM, WITH AN AQUEOUS, BASIC MATERIAL, SUCH AS AMMONIUM HYDROXIDE.
Inventors
- 👤 I Blank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:45
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08F; C08F220/00; C08F220/02; C08F220/04; C08F220/06; C08F8/00; C08F8/44; C08J2333/00
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |