Patent US2944071A successfully refreshed from Google Patents.
US2944071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acyl hydrazines
Assignee: Merck and Co Inc
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Filing: 1957-10-15
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Granted: 1960-07-05
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Expires: 1977-10-15
Abstract
No abstract record available.
Inventors
- 👤 Arsenio A Pessolano
- 👤 Robert L Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:19
CPC Classifications
C; C07; C07C; C07C241/00; C07C241/02; A; A61; A61K; A61K9/00; A61K9/20; A61K9/2004; A61K9/2013; A61K9/2022; A61K9/205; A61K9/2059; C07C243/00; C07C243/24; C07C243/26; C07C243/28; C07C243/30; C07C243/32; C07C243/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
15 words
A PRODUCT SELECTED FROM THE GROUP CONSISTING OF N-(3,3-DIPHENYL-3-HYDROXYPROPIONYL) N''-ACYL HYDRAZINES OF THE GENERAL FORMULA
Claim 2
Dependent Claim
15 words
A PRODUCT SELECTED FROM THE GROUP CONSISTING OF N-(3,3-DIPHENYL-3-HYDROXYPROPIONYL) N''-ACYL HYDRAZINES OF THE GENERAL FORMULA
Claim 3
Dependent Claim
3 words
N-(3,3-DIPHENYL-3-HYDROXYPROPIONYL) N''-LAUROYL HYDRAZINE.
Claim 4
Dependent Claim
3 words
N-(3,3-DIPHENYL-3-HYDROXYPROPIONYL) N''-LAUROYL HYDRAZINE.
References Cited (Backward Citations)
US2765304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |