Patent US3697485A successfully refreshed from Google Patents.
US3697485A
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Process for preparing polyisocyanurates and polyurethanes using organic orthoborate catalysts
Assignee: 3M Co
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Filing: 1969-07-10
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Granted: 1972-10-10
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Expires: 1989-07-10
Abstract
Abstract ISOCYANATES ARE TRIMERIZED, POLYMERIZED, OR REACTED WITH POLYOLS, IN THE PRESENCE OF A NEW CATALYST COMPRISING OR ORGANIC ORTHOBORATE AND AN ALCOHOLATE OR PHENOLATE SALT TO PRODUCE ISOCYANURATES, POLYISCYANURATES, URETHANE-MODIFIED POLYISOCYANURATES, OR ISOCYANURATE-MODIFIED POLYURETHANES.
Inventors
- 👤 George M Rambosek
- 👤 Michael George Allen
- 👤 George Van Dyke Tiers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:39
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08G; C08G18/00; C08G18/02; C08G18/022; C08G18/06; C08G18/08; C08G18/10; C08G18/16; C08G18/22; C08G18/225; C08G18/28; C08G18/30; C08G18/38; C08G18/3802; C08G18/3814; C08G18/3819; C08G18/3823; C08G18/3825; C08G18/3855; C08G18/3857; C08G18/3861; C08K; C08K5/00; C08K5/02; C08K5/16; C08G2110/00; C08G2110/0041; C08G2115/00; C08G2115/02; Y; Y10; Y10S; Y10S521/00; Y10S521/902
Claims Analysis
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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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |