US3504028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primary amides
Assignee: EN NOM COLLECTIF SCIENCE UNION
•
Filing: 1967-02-27
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Granted: 1970-03-31
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Expires: 1987-02-27
Abstract
No abstract record available.
Inventors
- 👤 Laszlo Beregi
- 👤 Pierre Hugon
- 👤 Jean-Claude Le Douarec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:54
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/16; A61K31/165; C; C07; C07C; C07C233/00; C07C233/01; C07C233/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3198833A
Cited
US3244718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-30 | 1973-09-29 | 1974-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-30 | 1977-09-29 | 1978-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-30 | 1981-09-29 | 1982-03-31 | $7700.00 | Window Closed / Lapsed |