US3636015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of thionamides
Assignee: WR Grace and Co
•
Filing: 1968-10-14
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Granted: 1972-01-18
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Expires: 1988-10-14
Abstract
Abstract IN ABSTRACT, THIS INVENTION IS DIRECTED TO THIONAMIDES HAVING THE FORMULAS: (NC-CH2-)2-N-CH2-C(=S)-NH2, N(-CH2-C(=S)-NH2)3, (H2N-C(=S)-CH2-)2-N-CH2-CH2-N(-CH2-C(=S)-NH2)2 (H2N-C(=S)-CH2-)2-N-CO-)BENZENE (H2N-C(=S)-CH2-)2-N-SO2-)BENZENE (H2N-C(=S)-CH(-CH3)-NH-)BENZENE (H2N-C(=S)-C(-CH3)2-NH-)BENZENE AND R-CNH(2N-X)-CO-N(-CH2-C(=S)-NH2)2 WHEREIN R IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF-H AND-CH3, N IS 1-16, AND X IS 0 OR 2, AND TO THE PREPARATION OF SUCH THIONAMIDES, ALL AS RECITED HEREINAFTER.
Inventors
- 👤 Patricia M Scanlon
- 👤 Elwyn R Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:03
CPC Classifications
C; C07; C07C; C07C255/00; D; D06; D06M; D06M13/00; D06M13/322; D06M13/402
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |