Patent US3231603A successfully refreshed from Google Patents.
US3231603A
Expired / Lapsed
US
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Preparation of unsymmetrically halogenated bisphenols and esters thereof
Assignee: Dow Chemical Co
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Filing: 1963-07-03
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Granted: 1966-01-25
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Expires: 1983-07-03
Abstract
No abstract record available.
Inventors
- 👤 Henry E Hennis
- 👤 Leonard R Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:54
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C07; C07C; C07C37/00; C07C37/01; C07C37/055; C07C37/0555
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A PROCESS FOR UNSYMMETRICALLY HALOGENATING AN ALKYLINDENEBISPHENOL NUCLEUS, WHICH PROCESS COMPRISES REACTING BY CONTACTING THE LOWER ALKANOIC ACID MONOESTER OF A BISPHENOL HAVING THE FORMULA
Claim 2
Dependent Claim
25 words
A PROCESS FOR UNSYMMETRICALLY HALOGENATING AN ALKYLINDENEBISPHENOL NUCLEUS, WHICH PROCESS COMPRISES REACTING BY CONTACTING THE LOWER ALKANOIC ACID MONOESTER OF A BISPHENOL HAVING THE FORMULA
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |