Patent US3221081A successfully refreshed from Google Patents.
US3221081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of ammonia complex of tri-alkyl boron as gelling catalyst for unsaturated polyester resins
Assignee: Compagnie de Saint Gobain SA
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Filing: 1962-01-23
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Granted: 1965-11-30
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Expires: 1982-01-23
Abstract
No abstract record available.
Inventors
- 👤 Sarradin Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:57
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/01; C08F4/00; C08F4/06; C08F4/12; C08F4/14; C08K; C08K5/00; C08K5/55; B; B29; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2027/00; B29K2027/06; B29K2105/00; B29K2105/0058; B29K2105/0067; B29K2105/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD OF FORMING STABLE, COPOLYMERIZABLE POLYESTER GELS WHICH COMPRISES IMCORPORATING A PEROXIDIC POLYMERIZATION CATALYST AND AN AMMONIA COMPLEX OF TRIALKYL BORON INTO AN UNGELLED ORGANIC POLYESTER WHICH IS DISSOLVED IN A POLYMERIZABLE MONOMER, THE COMPLEX BEING PRESENT IN A QUANTITY INEFFECTIVE BEYOND THE GEL STAGE, AND ALLOWING THE MIXTURE TO STAND AT ABOUT ROOM TEMPERATURE UNTIL THE POLYESTER GELLS, THEREBY FORMING A STABLE POLYMERIZABLE GEL.
Claim 2
Independent Claim
66 words
A METHOD OF FORMING STABLE, COPOLYMERIZABLE POLYESTER GELS WHICH COMPRISES IMCORPORATING A PEROXIDIC POLYMERIZATION CATALYST AND AN AMMONIA COMPLEX OF TRIALKYL BORON INTO AN UNGELLED ORGANIC POLYESTER WHICH IS DISSOLVED IN A POLYMERIZABLE MONOMER, THE COMPLEX BEING PRESENT IN A QUANTITY INEFFECTIVE BEYOND THE GEL STAGE, AND ALLOWING THE MIXTURE TO STAND AT ABOUT ROOM TEMPERATURE UNTIL THE POLYESTER GELLS, THEREBY FORMING A STABLE POLYMERIZABLE GEL.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |