US3284413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prepolymer isocyanurate resins
Assignee: Bayer Corp
•
Filing: 1964-12-16
•
Granted: 1966-11-08
•
Expires: 1984-12-16
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Heiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:31
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/02; C08G18/022; C08G18/06; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A METHOD OF PREPARING ISOCYANURATE COMPOSITIONS WHICH COMPRISES ADMIXING UNDER TRIMERIZATION CONDITIONS IN THE PRESENCE OF A TRIMERIZATION CATALYST (A) AN ORGANIC DIISOCYANATE HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 400 THE ADDITION PRODUCT OF AN EXCESS OF MONOMERIC ORGANIC DIISOCYANATE AND AN ORGANIC COMPOUND CONTAINING ACTIVE HYDROGEN CONTAINING GROUPS, SAID GROUPS BEING REACTIVE WITH ISOCYANATE GROUPS, SAID ORGANIC COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF DIHYDROXYL POLYESTERS PREPARED BY THE PROCESS WHICH COMPRISES REACTING DIHYDRIC ALCOHOLS AND DICARBOXYLIC ACIDS, DIHYDROXYL POLYESTER AMIDES, DIHYDRIC POLYALKYLENE ETHERS, DIHYDRIC POLYALKYLENE THIOETHERS AND DIHYDRIC POLYACETALS AND (B) AN ORGANIC MONISOCYANATE, THE MOLAR RATIO OF SAID MONOISOCYANATE TO SAID DIISOCYANATE BEING FROM ABOUT 0.2 TO ABOUT 2:1.
Claim 2
Independent Claim
115 words
A METHOD OF PREPARING ISOCYANURATE COMPOSITIONS WHICH COMPRISES ADMIXING UNDER TRIMERIZATION CONDITIONS IN THE PRESENCE OF A TRIMERIZATION CATALYST (A) AN ORGANIC DIISOCYANATE HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 400 THE ADDITION PRODUCT OF AN EXCESS OF MONOMERIC ORGANIC DIISOCYANATE AND AN ORGANIC COMPOUND CONTAINING ACTIVE HYDROGEN CONTAINING GROUPS, SAID GROUPS BEING REACTIVE WITH ISOCYANATE GROUPS, SAID ORGANIC COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF DIHYDROXYL POLYESTERS PREPARED BY THE PROCESS WHICH COMPRISES REACTING DIHYDRIC ALCOHOLS AND DICARBOXYLIC ACIDS, DIHYDROXYL POLYESTER AMIDES, DIHYDRIC POLYALKYLENE ETHERS, DIHYDRIC POLYALKYLENE THIOETHERS AND DIHYDRIC POLYACETALS AND (B) AN ORGANIC MONISOCYANATE, THE MOLAR RATIO OF SAID MONOISOCYANATE TO SAID DIISOCYANATE BEING FROM ABOUT 0.2 TO ABOUT 2:1.
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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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |