US3211776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic process for preparing aromatic chloroformates
Assignee: EIDP Inc
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Filing: 1963-01-22
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Granted: 1965-10-12
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Expires: 1983-01-22
Abstract
No abstract record available.
Inventors
- 👤 Stephens Curtis Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:17
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/96; C07C68/00; C07C68/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS FOR PREPARING AN AROMATIC ESTER OF CHLOROFORMIC ACID WHICH CONSISTS ESSENTIALLY OF REACTING PHOSGENE WITH A PHENOL THAT IS FREE OF OTHER NUCLEAR SUBSTITUENTS THAT ARE REACTIVE UNDER THE CONDITIONS OF CONDENSATION EMPLOYED, IN THE PRESENCE OF FROM ABOUT 0.5% TO ABOUT 8% BY WEIGHT BASED ON THE PHENOLIC COMPONENT, OF A COMPOUND HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
59 words
A PROCESS FOR PREPARING AN AROMATIC ESTER OF CHLOROFORMIC ACID WHICH CONSISTS ESSENTIALLY OF REACTING PHOSGENE WITH A PHENOL THAT IS FREE OF OTHER NUCLEAR SUBSTITUENTS THAT ARE REACTIVE UNDER THE CONDITIONS OF CONDENSATION EMPLOYED, IN THE PRESENCE OF FROM ABOUT 0.5% TO ABOUT 8% BY WEIGHT BASED ON THE PHENOLIC COMPONENT, OF A COMPOUND HAVING THE FOLLOWING 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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |