Patent US4985632A successfully refreshed from Google Patents.
US3759975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dichloromethylene carbamic acid esters and thioesters
Assignee: Bayer AG
•
Filing: 1969-12-12
•
Granted: 1973-09-18
•
Expires: 1989-12-12
Abstract
Abstract Dichloromethylenecarbonic acid esters and -thioesters are obtained by reacting dichloromethylenecarbamic acid chloride with alcohols, thioalcohols, phenols or thiophenols at a temperature range of from -50* to + 100* C. The compounds obtained by this process show pesticidal activity. They can, furthermore, be used for the preparation of the corresponding isocyanates.
Inventors
- 👤 W Reusche
- 👤 H Holtschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:51
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/28; C07C275/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
Process for preparing dichloromethylene carbamic acid esters which comprises reacting at a temperature of from -50* to +100* C. dichloromethylene carbamic acid chloride with a compound of the formula R(OH)n wherein n is an integer of from 1 to 6 inclusive; and R is selected from the group of n-valent aliphatic radicals having up to 24 carbon atoms, and the foregoing substituted with a substituent selected from the group of halo, lower alkoxy, lower alkyl mercapto, phenylmercapto, nitro, cyano.
Claim 2
Dependent Claim
16 words
Process as claimed in claim 2 wherein the reaction is carried out in an inert solvent.
Claim 3
Dependent Claim
24 words
Process as claimed in claim 2 wherein from 0.5 to 2 mols of dichloromethylene carbamic acid chloride are used per equivalent of said compound.
Claim 4
Dependent Claim
27 words
Process as claimed in claim 2 wherein the molar ratio of dichloromethylene carbamic acid chloride to said compound is in the range of from 0.8:1 to 1.2:1.
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |