US3248372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glycol modified isocyanurate containing polyisocyanates
Assignee: Bayer AG
•
Filing: 1961-11-03
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Granted: 1966-04-26
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Expires: 1981-11-03
Abstract
No abstract record available.
Inventors
- 👤 Bunge Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:14
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/02; C08G18/022; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009; C08G18/8012; C08G18/8054; C08G18/81; C08G18/8141; C08G18/815; C08G18/8191
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD OF MAKING COMPOUNDS CONTAINING ISOCYANURATE RINGS AND UNREACTED -NCO GROUPS SUBSTANTIALLY FREE FROM MONOMERIC ORGANIC DIISOCYANATE WITH A GLYCOL AND REACTING THE DIISOCYANATE WITH THE GLYCOL TO FORM A URETHANE HAVING TWO UNREACTED -NCO GROUPS, AND HEATING THE MIXTURE UNDER ALKALINE CONDITIONS UNTIL ABOUT ONE HALF OF THE UNREACTED -NCO GROUPS OF THE URETHANE HAVE POLYMERIZED AND THE UNREACTED MONOMERIC ORGANIC DIISOCYANATE IN THE MIXTURE HAS BEEN REDUCED TO A CONCENTRATION OF LESS THAN ABOUT 1 PERCENT.
Claim 2
Independent Claim
79 words
A METHOD OF MAKING COMPOUNDS CONTAINING ISOCYANURATE RINGS AND UNREACTED -NCO GROUPS SUBSTANTIALLY FREE FROM MONOMERIC ORGANIC DIISOCYANATE WITH A GLYCOL AND REACTING THE DIISOCYANATE WITH THE GLYCOL TO FORM A URETHANE HAVING TWO UNREACTED -NCO GROUPS, AND HEATING THE MIXTURE UNDER ALKALINE CONDITIONS UNTIL ABOUT ONE HALF OF THE UNREACTED -NCO GROUPS OF THE URETHANE HAVE POLYMERIZED AND THE UNREACTED MONOMERIC ORGANIC DIISOCYANATE IN THE MIXTURE HAS BEEN REDUCED TO A CONCENTRATION OF LESS THAN ABOUT 1 PERCENT.
References Cited (Backward Citations)
US3001973A
Cited
US3143517A
Cited
US2978449A
Cited
US2979485A
Cited
US2993870A
Cited
US3048566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |