US3784508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid cure polyepoxide oxazine or oxazoline systems
Assignee: Dow Chemical Co
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Filing: 1972-09-15
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Granted: 1974-01-08
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Expires: 1992-09-15
Abstract
Abstract THIS INVENTION RELATES TO COMPOSITIONS OF MATTER CONSISTING ESSENTIALLY OF (1) A LATENT CURABLE PREPOLYMER OF A POLYEPOXIDE AND AN OXAZINE COMPOUND AND (2) A POLYMERIZATION ACCELERATOR WHICH IS SOLUBLE IN SAID POLYMER AT A TEMPERATURE LESS THAN ABOUT 90*C. IN AN AMOUNT OF FROM ABOUT 1 TO 5 PERCENT BY WEIGHT OF PREPOLYMER AND WHICH IS A COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA R(X)N WHEREIN R IS AN ALIPHATIC RADICAL, X IS HALOGEN, COOH OR SH AND N IS AN INTEGER OF AT LEAST, 2; AND R(X)N WHEREIN R IS AN AROMATIC RADICAL, AND X IS OH OR SH AND N IS AN INTEGER OF FROM 1 TO 3.
Inventors
- 👤 D Tomalia
- 👤 R Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:18
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/40; C08G59/50; C08G59/5046
Claims Analysis
Total Claims: 0
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |