US2921085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of beta-aminopropionamides
Assignee: Lever Brothers Co
•
Filing: 1952-11-01
•
Granted: 1960-01-12
•
Expires: 1972-11-01
Abstract
No abstract record available.
Inventors
- 👤 Charles H Schramm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:25
CPC Classifications
C; C07; C07C; C07C237/00; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05; Y10S516/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2139190A
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US2328021A
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US2426891A
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US2443062A
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US2479525A
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US2523275A
Cited
US2451436A
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US2480439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |