US3779941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-resistant microcapsular opacifier system and products
Assignee: Champion International Corp
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Filing: 1970-07-17
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Granted: 1973-12-18
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Expires: 1990-07-17
Abstract
Abstract MICROCAPSULES HAVING CONTROLLED STRUCTURAL INTEGRITY ARE PRODUCED BY A PROCESS WHICH INVOLVES ADMIXING OIL-SOLUBLE, PARTIALLY-CONDENSED THERMOSSETING CONDENSATION POLYMERCONTAINING OILY SOLUTION AND A WATER-SOLUBLE POLYMER CONTAINING AQUEOUS SOLUTION AND CAUSING A CHEMICAL REACTION BETWEEEN THE POLYMERS AT THE RESULTING OIL/WATER INTERFACE. THE MICROCAPSULES ARE ACTIVATED BY EXPELLING THE OILY CORE MATERIAL AND REPLACING IT WITH AIR AND CURED TO PROVIDE OPACIFIERS HAVING EXCELLENT WATER RESISTANCE AND MAY BE EMPLOYED AS OPACIFYING AGENTS IN COATINGS AND PARTICULARLY IN PAINT FILMS.
Inventors
- 👤 M Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:15
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61K8/11; A61K9/00; A61K9/48; A61K9/50; A61Q; A61Q19/00; B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/14; B01J13/16; C; C09; C09D; C09D7/00; C09D7/40; C09D7/42; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |