US3320213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-extinguishing phenol-aldehyde resins prepared by reacting phenol with halogen-substituted aromatic aldehydes
Assignee: Dow Chemical Co
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Filing: 1964-01-27
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Granted: 1967-05-16
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Expires: 1984-01-27
Abstract
No abstract record available.
Inventors
- 👤 Harry A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:26
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28; C08G8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A FILM-FORMING, SELF-EXTINGUISHING, RESINOUS POLYMER OBTAINED BY HEATING, AT REACTION TEMPERATURE BETWEEN ABOUT 100*C. AND THE BOILING POINT OF THE REACTANTS, WITH EVOLUTION OF WATER, A MIXTURE OF (A) A HYROXY AROMATIC COMPOUND HAVING ONLY AROMATIC UNSATURATION AND ONLY ONE HYDROXY GROUP ATTACHED DIRECTLY TO THE AROMATIC RING AND (B) A HALOGEN-SUBSTITUTED ARYL ALDEHYDE OF THE FORMULA:
Claim 2
Dependent Claim
57 words
A FILM-FORMING, SELF-EXTINGUISHING, RESINOUS POLYMER OBTAINED BY HEATING, AT REACTION TEMPERATURE BETWEEN ABOUT 100*C. AND THE BOILING POINT OF THE REACTANTS, WITH EVOLUTION OF WATER, A MIXTURE OF (A) A HYROXY AROMATIC COMPOUND HAVING ONLY AROMATIC UNSATURATION AND ONLY ONE HYDROXY GROUP ATTACHED DIRECTLY TO THE AROMATIC RING AND (B) A HALOGEN-SUBSTITUTED ARYL ALDEHYDE OF THE FORMULA:
References Cited (Backward Citations)
GB721713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |