Patent US3155661A successfully refreshed from Google Patents.
US3155661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process fom producing substituted
Assignee: —
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Filing: —
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Granted: 1964-11-03
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Expires: 1981-11-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:23
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/14; C07D251/16; C07D251/18; C07C; C07C277/00; C07C277/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCESS FOR THE PREPARATION OF SUBSTITUTED GUANAMINES WHICH COMPRISES REACTING CYANAMIDE WITH AN ORGANIC NITRILE HAVING FROM TWO TO ABOUT THIRTY CARBON ATOMS IN THE LIQUID PHASE AND IN THE PRESENCE OF SUFFICIENT AMMONIA IN AN AMOUNT IN THE RANGE FROM ABOUT 0.5 TO ABOUT 10 MOLES PER MOLE OF CYANAMIDE TO DIRECT THE REACTION TOWARDS GUANAMINE FORMATION AT A REACTION TEMPERATURE WITHIN THE RANGE FROM ABOUT 90* UP TO ABOUT 250* C. AT WHICH THE REACTION PROCEEDS.
Claim 2
Dependent Claim
79 words
A PROCESS FOR THE PREPARATION OF SUBSTITUTED GUANAMINES WHICH COMPRISES REACTING CYANAMIDE WITH AN ORGANIC NITRILE HAVING FROM TWO TO ABOUT THIRTY CARBON ATOMS IN THE LIQUID PHASE AND IN THE PRESENCE OF SUFFICIENT AMMONIA IN AN AMOUNT IN THE RANGE FROM ABOUT 0.5 TO ABOUT 10 MOLES PER MOLE OF CYANAMIDE TO DIRECT THE REACTION TOWARDS GUANAMINE FORMATION AT A REACTION TEMPERATURE WITHIN THE RANGE FROM ABOUT 90* UP TO ABOUT 250* C. AT WHICH THE REACTION PROCEEDS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |