Patent US3257339A successfully refreshed from Google Patents.
US3257339A
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Reaction product of an organic polyiso-cyanate and an alkylene oxide adduct of a bis (aminophenyl) sulfone
Assignee: Union Carbide Corp
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Filing: 1963-07-22
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Granted: 1966-06-21
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Expires: 1983-07-22
Abstract
No abstract record available.
Inventors
- 👤 Hostettler Fritz
- 👤 Eugene F Cox
- 👤 William H Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:28
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5072
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A COMPOSITION THAT COMPRISES THE REACTION PRODUCT OF (A) AN ORGANIC POLYISOCYANATE AND (B) AN ALKYLENE OXIDE ADDUCT OF A BIS(AMINOPHENYL) SULFONE, WHEREIN SAID ALKYLENE OXIDE HAS FROM 2 TO 4 CARBON ATOMS, WHEREIN SAID ADDUCT HAS A HYDROXYL NUMBER OF FROM ABOUT 30 TO ABOUT 530, AND WHEREIN SAID BIS(AMINOPHENYL) SULFONE IS A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
58 words
A COMPOSITION THAT COMPRISES THE REACTION PRODUCT OF (A) AN ORGANIC POLYISOCYANATE AND (B) AN ALKYLENE OXIDE ADDUCT OF A BIS(AMINOPHENYL) SULFONE, WHEREIN SAID ALKYLENE OXIDE HAS FROM 2 TO 4 CARBON ATOMS, WHEREIN SAID ADDUCT HAS A HYDROXYL NUMBER OF FROM ABOUT 30 TO ABOUT 530, AND WHEREIN SAID BIS(AMINOPHENYL) SULFONE IS A COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
GB755533A
Cited
US3075927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |