US2574407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High molecular derivatives of piperazine
Assignee: Colgate Palmolive Co
•
Filing: 1949-06-23
•
Granted: 1951-11-06
•
Expires: 1969-06-23
Abstract
No abstract record available.
Inventors
- 👤 Malkemus John David
- 👤 Ross John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:12
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06; Y10S516/07
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
A PIPERAZINE HAVING THE FOLLOWING STRUCTURAL FORMULA:
Claim 2
Dependent Claim
7 words
A PIPERAZINE HAVING THE FOLLOWING STRUCTURAL FORMULA:
Claim 3
Dependent Claim
17 words
A PROCESS FOR PREPARING SURFACE-ACTIVE COMPOUNDS WHICH COMPRISES REACTING A PIPERAZINE DERIVATIVE HAVING THE FOLLOWING STRUCTURAL FORMULA:
Claim 4
Dependent Claim
17 words
A PROCESS FOR PREPARING SURFACE-ACTIVE COMPOUNDS WHICH COMPRISES REACTING A PIPERAZINE DERIVATIVE HAVING THE FOLLOWING STRUCTURAL FORMULA:
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) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |