Patent US3097191A successfully refreshed from Google Patents.
US3097191A
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Polyisocyanate compositions
Assignee: Imperial Chemical Industries Ltd
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Filing: 1958-03-27
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Granted: 1963-07-09
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Expires: 1978-03-27
Abstract
No abstract record available.
Inventors
- 👤 France Harold
- 👤 Lister Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:56
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664; C07; C07C; C07C263/00; C07C263/10; C08G18/7671; C08G18/77; C08G18/78; C08G18/79; C08G18/791; Y; Y10; Y10S; Y10S521/00; Y10S521/902; Y10S528/00; Y10S528/903; Y10S528/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A LIQUID POLYISOCYANATE COMPOSITION OBTAINED BY PHOSGENTING A PLYAMINE COMPOSITION, SAID POLYAMINE COMPOSITION BEING THE PRODUCT OBTAINED BY CONDENSING FORMALDEHYDE WITH AT LEAST TWO MOLES OF MIXED AROMATIC AMINES SELECTED FROM THE GROUP OF AROMATIC AMINE MIXTURES CONSISTING OF (A) ANILINE AND O-TOLUDINE, (B) ANILINE AND O-CHLOROANILINE AND (C) ANILINE, O-TOLUDINE, AN MTOLYENEDIAMINE, THE PROPORTONS OF THE AMINES IN SAID MIXTURES BEING SUCH THAT OF THE TOTAL AMINES CONVERTED INTO POLYISOCYANATES, NOT MORE THAN 80% BY MOLECULAR PROPORTIONS CONSISTS OF ANY SINGLE AMINE, THE BOILING POINT AT LOW PRESSURE OF SAID POLYAMINE COMPOSITION BEING IN THE RANGE OF ABOUT 166*C. AT 0.1 MM. TO 230*C. AT 0.2 MM.
Claim 2
Dependent Claim
108 words
A LIQUID POLYISOCYANATE COMPOSITION OBTAINED BY PHOSGENTING A PLYAMINE COMPOSITION, SAID POLYAMINE COMPOSITION BEING THE PRODUCT OBTAINED BY CONDENSING FORMALDEHYDE WITH AT LEAST TWO MOLES OF MIXED AROMATIC AMINES SELECTED FROM THE GROUP OF AROMATIC AMINE MIXTURES CONSISTING OF (A) ANILINE AND O-TOLUDINE, (B) ANILINE AND O-CHLOROANILINE AND (C) ANILINE, O-TOLUDINE, AN MTOLYENEDIAMINE, THE PROPORTONS OF THE AMINES IN SAID MIXTURES BEING SUCH THAT OF THE TOTAL AMINES CONVERTED INTO POLYISOCYANATES, NOT MORE THAN 80% BY MOLECULAR PROPORTIONS CONSISTS OF ANY SINGLE AMINE, THE BOILING POINT AT LOW PRESSURE OF SAID POLYAMINE COMPOSITION BEING IN THE RANGE OF ABOUT 166*C. AT 0.1 MM. TO 230*C. AT 0.2 MM.
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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) | 1966-07-08 | 1967-01-07 | 1967-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-08 | 1971-01-07 | 1971-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-08 | 1975-01-07 | 1975-07-09 | $7700.00 | Window Closed / Lapsed |