Patent US3538337A successfully refreshed from Google Patents.
US2502003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alcohol-soluble aralkyl-phenolic condensation product
Assignee: Neville Co
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Filing: 1945-04-06
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Granted: 1950-03-28
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Expires: 1965-04-06
Abstract
No abstract record available.
Inventors
- 👤 Lyle M Geiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:47
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08; C08G; C08G65/00; C08G65/002; C08G65/005; C08G65/34; C08G65/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
THAT METHOD OF MAKING AN ALCOHOL-SOLUBLE RESINOUS MATERIAL WHICH COMPRISES ADDING STYRENE PROGRESSIVELY TO AN AGITATED HEATED MIXTURE OF PHENOL AND A BORON TRIFLUORIDE CATALYST, THE AMOUNT OF STYRENE BEING SUBSTANTIALLY ONE MOL PER MOL OF PHENOL, AND RECOVERING A RESINOUS PRODUCT CHARACTERIZED BY SOLUBILITY IN ALCOHOLS AND COMPATIBILITY WITH CELLULOSE ACETATE AND ZEIN.
Claim 2
Dependent Claim
54 words
THAT METHOD OF MAKING AN ALCOHOL-SOLUBLE RESINOUS MATERIAL WHICH COMPRISES ADDING STYRENE PROGRESSIVELY TO AN AGITATED HEATED MIXTURE OF PHENOL AND A BORON TRIFLUORIDE CATALYST, THE AMOUNT OF STYRENE BEING SUBSTANTIALLY ONE MOL PER MOL OF PHENOL, AND RECOVERING A RESINOUS PRODUCT CHARACTERIZED BY SOLUBILITY IN ALCOHOLS AND COMPATIBILITY WITH CELLULOSE ACETATE AND ZEIN.
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) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |