US2987494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solutions of synthetic linear polyurethanes in dimethylsulfoxide and process of making same
Assignee: Solutia Inc
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Filing: 1958-03-26
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Granted: 1961-06-06
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Expires: 1978-03-26
Abstract
No abstract record available.
Inventors
- 👤 William B Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:43
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/097; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A COMPOSITION OF MATTER COMPRISING A SOLUTION IN DIMETHYLSULFOXIDE OF A SYNTHETIC LINEAR POLYURETHANE WHICH IS THE PRODUCT OF REACTING PIPERAZINE WITH 1,4-BUTANEDIOL BIS-CHLOROFORMATE.
Claim 2
Dependent Claim
24 words
A COMPOSITION OF MATTER COMPRISING A SOLUTION IN DIMETHYLSULFOXIDE OF A SYNTHETIC LINEAR POLYURETHANE WHICH IS THE PRODUCT OF REACTING PIPERAZINE WITH 1,4-BUTANEDIOL BIS-CHLOROFORMATE.
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) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |