US2642450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thiolurethane quaternary ammonium salts and processes for preparing them
Assignee: Merck and Co Inc
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Filing: 1949-12-13
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Granted: 1953-06-16
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Expires: 1969-12-13
Abstract
No abstract record available.
Inventors
- 👤 Weijlard John
- 👤 Tishler Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:00
CPC Classifications
C; C07; C07C; C07C333/00; C07C333/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
THE PROCESS WHICH COMPRISES REACTING DIMETHLAMINOETHYL THIOL WITH A CARBAMYL CHLORIDE HAVING TWO SATURATED HYDROCARBON SUBSTITUENTS ATTACHED TO THE NITROGEN ATOM OF THE CARBAMYL GROUPING TO PRODUCE A THIOLURETHANE OF THE FORMULA:
Claim 2
Dependent Claim
32 words
THE PROCESS WHICH COMPRISES REACTING DIMETHLAMINOETHYL THIOL WITH A CARBAMYL CHLORIDE HAVING TWO SATURATED HYDROCARBON SUBSTITUENTS ATTACHED TO THE NITROGEN ATOM OF THE CARBAMYL GROUPING TO PRODUCE A THIOLURETHANE OF THE 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) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |