US2853473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of carbodiimides
Assignee: EIDP Inc
•
Filing: 1956-08-27
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Granted: 1958-09-23
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Expires: 1976-08-27
Abstract
No abstract record available.
Inventors
- 👤 Tod W Campbell
- 👤 John J Verbanc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:24
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/02; C08G18/025; C07; C07C; C07C267/00; Y; Y10; Y10S; Y10S521/00; Y10S521/901; Y10S528/00; Y10S528/903; Y10S528/906
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
65 words
IN THE PROCESS FOR PREPARING ORGANIC CARBODIIMIDES FROM ORGANIC ISOCYANATES HAVING NO ACTIVE HYDROGEN-CONTAINING SUBSTITUENTS WHICH ARE REACTIVE WITH AN ISOCYANATE GROUP, THE STEP COMPRISING TREATING SAID ORGANIC ISOCYANATE WITH FROM 0.01 TO 10.0 PARTS BY WEIGHT OF A PHOSPHORUS COMPOUND PER 100 PARTS BY WEIGHT OF SAID ISOCYANATE, SAID PHOSPHORUS COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF A SUBSTITUTED PHOSPHOLINE HAVING THE FORMULA
Claim 2
Dependent Claim
65 words
IN THE PROCESS FOR PREPARING ORGANIC CARBODIIMIDES FROM ORGANIC ISOCYANATES HAVING NO ACTIVE HYDROGEN-CONTAINING SUBSTITUENTS WHICH ARE REACTIVE WITH AN ISOCYANATE GROUP, THE STEP COMPRISING TREATING SAID ORGANIC ISOCYANATE WITH FROM 0.01 TO 10.0 PARTS BY WEIGHT OF A PHOSPHORUS COMPOUND PER 100 PARTS BY WEIGHT OF SAID ISOCYANATE, SAID PHOSPHORUS COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF A SUBSTITUTED PHOSPHOLINE HAVING THE FORMULA
Claim 3
Dependent Claim
15 words
A PROCESS ACCORDING TO CLAIM 1 WHEREIN THE ORGANIC ISOCYANATE IS AN ISOCYANATE-TERMINATED POLYURETHANE POLYMER.
Claim 4
Dependent Claim
26 words
A PROCESS ACCORDING TO CLAIM 6 WHEREIN THE ISOCYANATE-TERMINATED POLYURETHANE POLYMER IS PREPARED BY REACTING A POLYALKYLENEETHER GLYCOL WITH A MOLAR EXCESS OF AN ORGANIC DIISOCYANATE.
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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |