Patent US2698343A successfully refreshed from Google Patents.
US2698343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor phase process for the production of dimethylcarbamyl chloride from phosgene and trimethyl amine
Assignee: Bayer AG
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Filing: 1952-11-04
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Granted: 1954-12-28
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Expires: 1972-11-04
Abstract
No abstract record available.
Inventors
- 👤 Stein Eberhard
- 👤 Bayer Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:07
CPC Classifications
C; C07; C07C; C07C271/00; C07C271/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PROCESS FOR PREPARING DIMETHYL CARBAMYL CHLORIDE WHICH COMPRISES REACTING PHOSGENE AND TRIMETHYL AMINE AT ELEVATED TEMPERATURE IN THE GASEOUS PHASE.
Claim 2
Dependent Claim
21 words
A PROCESS FOR PREPARING DIMETHYL CARBAMYL CHLORIDE WHICH COMPRISES REACTING PHOSGENE AND TRIMETHYL AMINE AT ELEVATED TEMPERATURE IN THE GASEOUS PHASE.
References Cited (Backward Citations)
US2480088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |