US3419624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel bisphenols of dicyclopentadiene
Assignee: Union Carbide Corp
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Filing: 1964-02-24
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Granted: 1968-12-31
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Expires: 1984-02-24
Abstract
No abstract record available.
Inventors
- 👤 Robert J Cotter
- 👤 Francis N Apel
- 👤 Jr Louis B Conte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:06
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/06; C09K15/08; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08G64/00; C08G64/04; C08G64/06; C08L; C08L75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
BISPHENOL REACTION PRODUCT OBTAINED OVER AN ACIDIC CATION EXCHANGING RESIN BY CONTACTING DICYCLOPENTADIENE WITH AT LEAST A STOICHIOMETRIC AMOUNT OF PHENOL AT A TEMPERATURE OF ABOUT 30*C. TO 150*C.
Claim 2
Dependent Claim
29 words
BISPHENOL REACTION PRODUCT OBTAINED OVER AN ACIDIC CATION EXCHANGING RESIN BY CONTACTING DICYCLOPENTADIENE WITH AT LEAST A STOICHIOMETRIC AMOUNT OF PHENOL AT A TEMPERATURE OF ABOUT 30*C. TO 150*C.
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) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |