US2508652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Di-nu-substituted piperazine derivatives and method of preparing same
Assignee: Colgate Palmolive Co
•
Filing: 1947-05-13
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Granted: 1950-05-23
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Expires: 1967-05-13
Abstract
No abstract record available.
Inventors
- 👤 Ross John
- 👤 Malkemus John David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:17
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/18; C07D295/182; C07D295/185; C07D295/04; C07D295/08; C07D295/084; C07D295/088; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A PIPERAZINE DERIVATIVE HAVING THE FOLLOWING STRUCTURAL FORMULA:
Claim 2
Dependent Claim
8 words
A PIPERAZINE DERIVATIVE HAVING THE FOLLOWING STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2302388A
Cited
US2421707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |