US3152162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyisocyanate-carbodiimide adducts and process for the production thereof
Assignee: Bayer AG
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Filing: 1960-07-20
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Granted: 1964-10-06
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Expires: 1980-07-20
Abstract
No abstract record available.
Inventors
- 👤 Fischer Peter
- 👤 Meisert Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:39
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/797; Y; Y10; Y10S; Y10S521/00; Y10S521/901
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
A CARBODIMIDE-ISOCYANATE ADDUCT OF DIPHENYLMETHANE DIISOCYANATE WHICH ADSORBS LIGHT IN THE INFRA-RED RANGE OF FROM 5:76 TO 5:78 MICRONS AND FROM 7.24 TO 7.22 MICRONS.
Claim 2
Dependent Claim
25 words
A CARBODIMIDE-ISOCYANATE ADDUCT OF DIPHENYLMETHANE DIISOCYANATE WHICH ADSORBS LIGHT IN THE INFRA-RED RANGE OF FROM 5:76 TO 5:78 MICRONS AND FROM 7.24 TO 7.22 MICRONS.
Claim 3
Dependent Claim
58 words
A PROCESS FOR THE PRODUCTION OF A CARBODIIMIDEPOLYISOCYANATE ADDUCT CONTAINING FREE ISOCYANATE GROUPS, WHICH COMPRISES HEATING TO A TEMPERATURE OF FROM ABOUT 150*C. TO ABOUT 300*C. POLYISOCYANATES OF THE DIPHENYL METHANE SERIES UNTIL A MAXIMUM OF 33% OF THE EXISTING ISOCYANATE GROUPS HAVE REACTED TO FORM THE CARBODIIMIDE CONTAINING AT LEAST TWO-NCO GROUPS AND COOLING SAID REACTION MASS.
Claim 4
Dependent Claim
58 words
A PROCESS FOR THE PRODUCTION OF A CARBODIIMIDEPOLYISOCYANATE ADDUCT CONTAINING FREE ISOCYANATE GROUPS, WHICH COMPRISES HEATING TO A TEMPERATURE OF FROM ABOUT 150*C. TO ABOUT 300*C. POLYISOCYANATES OF THE DIPHENYL METHANE SERIES UNTIL A MAXIMUM OF 33% OF THE EXISTING ISOCYANATE GROUPS HAVE REACTED TO FORM THE CARBODIIMIDE CONTAINING AT LEAST TWO-NCO GROUPS AND COOLING SAID REACTION MASS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |