US3553165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of poly-epoxy condensates
Assignee: Chiyoda Corp
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Filing: 1966-04-28
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Granted: 1971-01-05
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Expires: 1986-04-28
Abstract
Abstract EPOXY RESINS HAVING A MAXIMUM SOFTENING POINT ABOVE 95-97*C. ARE PREPARED BY CONDENSATION OF B-METHYL EPICHLOROHYDRIN OR B-CHLOROMETHYL EPICHLOROHYDRIN WITH BISPHENOL-A IN A SINGLE REACTION STEP IN THE ABSENCE OF A SOLVENT OTHER THAN DIOXANE.
Inventors
- 👤 Tomoo Kiryu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:59
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/063
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |