US2915499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of bisphenols and 3, 9-dialkenylspirobi-(m-dioxanes)
Assignee: Union Carbide Corp
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Filing: 1956-12-27
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Granted: 1959-12-01
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Expires: 1976-12-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Wilson
- 👤 Richard K Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:46
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28; C08G8/30; C08G4/00; C08G8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A RESINOUS HEAT REACTION PRODUCT OF FROM 0.25 TO 4 EQUIVALENTS OF A BISPHENOL OF THE GROUP CONSISTING OF A DIHYDROXYDIPHENYLMETHANE AND 2,2-BIS-(P-HYDROXYPHENYL) PROPANE WITH ONE EQUIVALENT OF A 3,9-DIALKENYLSPIROBI(M-DIOXANE) HAVING FROM 2 TO 3 CARBON ATOMS IN THE ALKENYL RADICAL AND HAVING THE DOUBLE BOND OF THE ALKENYL RADICAL IN THE ALPHA POSITION.
Claim 2
Dependent Claim
54 words
A RESINOUS HEAT REACTION PRODUCT OF FROM 0.25 TO 4 EQUIVALENTS OF A BISPHENOL OF THE GROUP CONSISTING OF A DIHYDROXYDIPHENYLMETHANE AND 2,2-BIS-(P-HYDROXYPHENYL) PROPANE WITH ONE EQUIVALENT OF A 3,9-DIALKENYLSPIROBI(M-DIOXANE) HAVING FROM 2 TO 3 CARBON ATOMS IN THE ALKENYL RADICAL AND HAVING THE DOUBLE BOND OF THE ALKENYL RADICAL IN THE ALPHA POSITION.
References Cited (Backward Citations)
US2401776A
Cited
DE868351C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |