US3714079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of phenolphthalein used in polyurethane preparation
Assignee: Hooker Chemical Corp
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Filing: 1971-04-12
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Granted: 1973-01-30
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Expires: 1991-04-12
Abstract
Abstract NOVEL DERIVATIVES OF PHENOLPHTHALEIN ARE PREPARED BY REACTING THE COMPOUND WITH AMMONIA OR AN AMINE, AND WITH AMMONIA OR AN AMINE, FOLLOWED BY A 1,2-EPOXIDE. SUCH POLYHYDRIC DERIVATIVES OF PHENOLPHTHALEIN ARE USEFUL IN THE PREPARATION OF POLYURETHANE COMPOSITIONS SUCH AS FOAMS, COATINGS AND ELASTOMERS, FOR THE PRODUCTION OF SATURATED ALKYD RESINS, UNSATURATED POLYESTERS, AND AS INTERMEDIATES IN THE PREPARATION OF OTHER POLYMER COMPOSITIONS.
Inventors
- 👤 B Wilson
- 👤 R Hindersinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:01
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2615; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5036; C08G63/00; C08G63/68; C08G63/685; C08G63/6854; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
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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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |