Patent US3840580A successfully refreshed from Google Patents.
US3840580A
Expired / Lapsed
US
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Phenol precursors
Assignee: Imperial Chemical Industries Ltd
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Filing: 1971-07-15
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Granted: 1974-10-08
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Expires: 1991-07-15
Abstract
Abstract 1. A PHENOL PRECURSOR HAVING THE FORMULA (1''ZQO) MY IN WHICH Q IS A BIVALENT AROMATIC RADICAL DERIVED FROM A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A BENZENE, BIPHENYL, NAPHTHALENE, INDENE, ANTHRACENE, FLUORENE, ACENAPHTHENE, PHENANTHRENE, CHRYSENE, DIBENZOFURAN AND DIBENZOTHIOPHEN COMPOUND, Q'' IS A UNIVALENT HALOPHENYL OR NAPHTHYL RADICAL, Z IS -SO2- OR -CO-, Y IS -CO- AND M IS 2.
Inventors
- 👤 R Feasey
- 👤 J Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:23
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C07; C07C; C07C205/00; C07C205/45; C07C317/00; C07C45/00; C07C45/61; C07C45/67; C07C45/673; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/14; C07F9/1406; C08G64/00; C08G64/04; C08G64/06; C08G64/08; C08G65/00; C08G65/34; C08G65/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PHENOL PRECURSOR HAVING THE FORMULA (1''ZQO) MY IN WHICH Q IS A BIVALENT AROMATIC RADICAL DERIVED FROM A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A BENZENE, BIPHENYL, NAPHTHALENE, INDENE, ANTHRACENE, FLUORENE, ACENAPHTHENE, PHENANTHRENE, CHRYSENE, DIBENZOFURAN AND DIBENZOTHIOPHEN COMPOUND, Q'' IS A UNIVALENT HALOPHENYL OR NAPHTHYL RADICAL, Z IS -SO2- OR -CO-, Y IS -CO- AND M IS 2.
Claim 2
Dependent Claim
60 words
A PHENOL PRECURSOR HAVING THE FORMULA (1''ZQO) MY IN WHICH Q IS A BIVALENT AROMATIC RADICAL DERIVED FROM A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A BENZENE, BIPHENYL, NAPHTHALENE, INDENE, ANTHRACENE, FLUORENE, ACENAPHTHENE, PHENANTHRENE, CHRYSENE, DIBENZOFURAN AND DIBENZOTHIOPHEN COMPOUND, Q'' IS A UNIVALENT HALOPHENYL OR NAPHTHYL RADICAL, Z IS -SO2- OR -CO-, Y IS -CO- AND M IS 2.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |