Patent US3420853A successfully refreshed from Google Patents.
US3420853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-amino-4-phenyl-3-buten-2-ols and salts thereof
Assignee: Philips North America LLC
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Filing: 1965-07-12
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Granted: 1969-01-07
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Expires: 1985-07-12
Abstract
No abstract record available.
Inventors
- 👤 Hendrik Durk Moed
- 👤 Gerard Bernard Paerels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:27
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/13; A61K31/135; C; C07; C07C; C07C33/00; C07C33/28
Claims Analysis
Total Claims: 0
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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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |