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US3585156A
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Catalyst modifiers for dihydropyranyl foamable compositions
Assignee: PPG Architectural Coatings Canada Inc
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Filing: 1969-01-27
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Granted: 1971-06-15
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Expires: 1989-01-27
Abstract
Abstract SPECIFIC AMINE CATALYST MODIFIERS FOR CONTROLLING THE POLYMERIZATION OF ACID CATALYZED FOAMABLE COMPOSITIONS CONTAINING DIHYDROPYRANYL COMPOUNDS. THE CATALYST MODIFERS SLOW DOWN THE POLYMERIZATION REACTION AND PROVIDE WELL CURED FOAMED CELLULAR PLOYMERIC MATERIALS.
Inventors
- 👤 Norman Dennis Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:43
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/143; C08J9/147; C08J2371/00
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |