US2769812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-methyl-2-(3,3-diphenylpropyl) piperidine and preparation thereof
Assignee: STWB Inc
•
Filing: 1950-08-15
•
Granted: 1956-11-06
•
Expires: 1970-08-15
Abstract
No abstract record available.
Inventors
- 👤 Ruddy Arlo Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:21
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/08; C07D211/18; C07D211/10; C07D211/14; C07D211/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
THE PROCESS FOR PREPARING 1-METHYL-2-(3,3-DIPHENYLPROPYL(PIPERIDINE WHICH COMPRISES HEATING DIPHENYLACETONITRILE WITH A 1-METHYL-2-(2-HALOETHYL)PIPERIDINE IN THE PRESENCE OF A STRONG METALATING AGENT AT A TEMPERATURE OF ABOUT 50* C., AND HEATING THE RESULTING PRODUCT WITH SODIUM AMIDE AT A TEMPERATURE OF AT LEAST ABOUT 80* C.
Claim 2
Dependent Claim
44 words
THE PROCESS FOR PREPARING 1-METHYL-2-(3,3-DIPHENYLPROPYL(PIPERIDINE WHICH COMPRISES HEATING DIPHENYLACETONITRILE WITH A 1-METHYL-2-(2-HALOETHYL)PIPERIDINE IN THE PRESENCE OF A STRONG METALATING AGENT AT A TEMPERATURE OF ABOUT 50* C., AND HEATING THE RESULTING PRODUCT WITH SODIUM AMIDE AT A TEMPERATURE OF AT LEAST ABOUT 80* C.
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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) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |