Patent US2639291A successfully refreshed from Google Patents.
US2639291A
Expired / Lapsed
US
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Process for making thiocyanogen derivatives
Assignee: Beazer East Inc
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Filing: 1952-05-06
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Granted: 1953-05-19
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Expires: 1972-05-06
Abstract
No abstract record available.
Inventors
- 👤 Harry F Pfann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:10
CPC Classifications
C; C07; C07C; C07C331/00; C07C331/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN A PROCESS FOR PREPARING A THIOCYANOGEN DERIVATIVE OF A THIOCYANOGEN ACCEPTOR SELECTED FROM THE CLASS CONSISTING OF AROMATIC AMINES, PHONELS AND OLEFINIC COMPOUNDS THE STEPS OF BRINGING THIOCYANIC ACID, HYDROGEN PEROXIDE, AND SAID THIOCYANOGEN ACCEPTOR TOGETHER IN A MUTUAL SOLVENT AT A TEMPERATURE BETWEEN ABOUT 0 AND 50* C. AND RECOVERING THE THIOCYANOGEN DERIVATIVE THEREFROM.
Claim 2
Dependent Claim
56 words
IN A PROCESS FOR PREPARING A THIOCYANOGEN DERIVATIVE OF A THIOCYANOGEN ACCEPTOR SELECTED FROM THE CLASS CONSISTING OF AROMATIC AMINES, PHONELS AND OLEFINIC COMPOUNDS THE STEPS OF BRINGING THIOCYANIC ACID, HYDROGEN PEROXIDE, AND SAID THIOCYANOGEN ACCEPTOR TOGETHER IN A MUTUAL SOLVENT AT A TEMPERATURE BETWEEN ABOUT 0 AND 50* C. AND RECOVERING THE THIOCYANOGEN DERIVATIVE THEREFROM.
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) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |