US3170946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of arylchloroformates
Assignee: Union Carbide Corp
•
Filing: 1961-08-17
•
Granted: 1965-02-23
•
Expires: 1981-08-17
Abstract
No abstract record available.
Inventors
- 👤 John R Kilsheimer
- 👤 William H Hensley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:12
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/96; A; A01; A01N; A01N47/00; A01N47/02; C07C68/00; C07C68/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS FOR PREPARING AN ARYCHLOROFORMATE WHICH COMPRISES REACTING AN ARYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1-NAPHTHOL AND PHENOL WITH PHOSGENE AT A TEMPERATURE OF 100 TO 300*C. IN CONTACT WITH FROM 0.05 TO 0.5 MOL PERCENT BASED ON SAID ARYL COMPOUND OF AN AMINE SELECTED FROM THE GROUP CONSISTING OF TERTIARY AMINES AND THEIR HYDROCHLORIDE AND HYDROBROMIDE SALTS, SAID TERTIARY AMINE HAVING AN IONIZATION CONSTANT NO HIGHER THAN 5X10**4 AT 25*C., ORGANIC IN THE PRESENCE OF AN INERT SOLVENT HAVING A BOILING POINT OF 95-300*C.
Claim 2
Dependent Claim
88 words
A PROCESS FOR PREPARING AN ARYCHLOROFORMATE WHICH COMPRISES REACTING AN ARYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1-NAPHTHOL AND PHENOL WITH PHOSGENE AT A TEMPERATURE OF 100 TO 300*C. IN CONTACT WITH FROM 0.05 TO 0.5 MOL PERCENT BASED ON SAID ARYL COMPOUND OF AN AMINE SELECTED FROM THE GROUP CONSISTING OF TERTIARY AMINES AND THEIR HYDROCHLORIDE AND HYDROBROMIDE SALTS, SAID TERTIARY AMINE HAVING AN IONIZATION CONSTANT NO HIGHER THAN 5X10**4 AT 25*C., ORGANIC IN THE PRESENCE OF AN INERT SOLVENT HAVING A BOILING POINT OF 95-300*C.
References Cited (Backward Citations)
US2648697A
Cited
GB808490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |