Patent US2845458A successfully refreshed from Google Patents.
US2845458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
C-chloro-n, n, n'-trimethylformamidine hydrochloride
Assignee: Wyeth Holdings LLC
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Filing: 1956-05-21
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Granted: 1958-07-29
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Expires: 1976-05-21
Abstract
No abstract record available.
Inventors
- 👤 Hans Z Lecher
- 👤 Elizabeth M Hardy
- 👤 Clement L Kosloski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:16
CPC Classifications
C; C07; C07C; C07C273/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A PROCESS FOR THE PREPARATION OF C-CHLORO-N,N,N''TRIMETHYLFORMAMIDINE HYDROCHLORIDE WHICH CONSISTS IN: ADDING AN S-ALKYL-N,N,N''-TRIMETHYLISOTHIOUREA TO AN AGITATED SOLUTION OF CHLORINE IN CARBON TETRACHLORIDE AT A TEMPERATURE BELOW 50*C., AND THEN RECOVERING C-CHLORON,N,N''-TRIMETHYLFORMAMIDINE HYDROCHLORIDE.
Claim 2
Dependent Claim
33 words
A PROCESS FOR THE PREPARATION OF C-CHLORO-N,N,N''TRIMETHYLFORMAMIDINE HYDROCHLORIDE WHICH CONSISTS IN: ADDING AN S-ALKYL-N,N,N''-TRIMETHYLISOTHIOUREA TO AN AGITATED SOLUTION OF CHLORINE IN CARBON TETRACHLORIDE AT A TEMPERATURE BELOW 50*C., AND THEN RECOVERING C-CHLORON,N,N''-TRIMETHYLFORMAMIDINE HYDROCHLORIDE.
References Cited (Backward Citations)
US2146744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |