US3243464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prqcess of preparing and purifyin g octochlorodihydroxydiphenyl
Assignee: —
•
Filing: —
•
Granted: 1966-03-29
•
Expires: 1983-03-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:28
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR PREPARATION OF OCTACHLORODIHYDROXYDIPHENYL COMPRISING HYDROLYZING DECACHLORODIPHENYL WITH AN AQUEOUS SOLUTION OF A HYDROXIDE OF AN ALKALI METAL IN EXCESS OF THE STOICHIOMETRIC AMOUNT REQUIRED TO REACT WITH SAID DECACHLORODIPHENYL, CARRYING OUR SAID HYDROLYZING AT A TEMPERATURE BETWEEN 200*C. AND 300*C. TO FORM AN ALKALINE AQUEOUS SOLUTION OF OCTACHLORODIHYDROXYDIPHENYL FILTERING SAID SOLUTION, ADDING TO SAID FILTERED SOLUTION OF OCTACHLORODIHYDROXYDIPHENYL A SOLUBLE BIVALENT SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF IRON, COPPER, MANGANESE, NICKEL, COBALT, CALCIUM, BARIUM, STRONTIUM, MAGNESIUM SEPARATING THE METAL HYDROXIDE PRECIPITATE FORMED, ACIDIFYING THE FILTRATE WITH A MINERAL ACID TO PRECIPITATE OCTACHLORODIHYDROXYDIPHENYL, SEPARATING, WASHING AND DRYING SAID OCTACHLORODIHYDROXYDIPHENYL.
Claim 2
Dependent Claim
105 words
A PROCESS FOR PREPARATION OF OCTACHLORODIHYDROXYDIPHENYL COMPRISING HYDROLYZING DECACHLORODIPHENYL WITH AN AQUEOUS SOLUTION OF A HYDROXIDE OF AN ALKALI METAL IN EXCESS OF THE STOICHIOMETRIC AMOUNT REQUIRED TO REACT WITH SAID DECACHLORODIPHENYL, CARRYING OUR SAID HYDROLYZING AT A TEMPERATURE BETWEEN 200*C. AND 300*C. TO FORM AN ALKALINE AQUEOUS SOLUTION OF OCTACHLORODIHYDROXYDIPHENYL FILTERING SAID SOLUTION, ADDING TO SAID FILTERED SOLUTION OF OCTACHLORODIHYDROXYDIPHENYL A SOLUBLE BIVALENT SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF IRON, COPPER, MANGANESE, NICKEL, COBALT, CALCIUM, BARIUM, STRONTIUM, MAGNESIUM SEPARATING THE METAL HYDROXIDE PRECIPITATE FORMED, ACIDIFYING THE FILTRATE WITH A MINERAL ACID TO PRECIPITATE OCTACHLORODIHYDROXYDIPHENYL, SEPARATING, WASHING AND DRYING SAID OCTACHLORODIHYDROXYDIPHENYL.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |