Patent US4301775A successfully refreshed from Google Patents.
Patent US3701808A successfully refreshed from Google Patents.
US3701808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenylethanolamines
Assignee: Allen and Hanburys Ltd
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Filing: 1971-05-11
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Granted: 1972-10-31
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Expires: 1991-05-11
Abstract
Abstract COMPOUNDS OF THE FORMULA 2-(R3-SO2-N(-R1)-CH2-),4-(R5-NH-CH2-CH(OH)-)PHENOL WHEREIN R1 IS H ALKYL OF 1 TO 6 CARBON ATOMS; R3 IS ALKYL OF 1 TO 6 CARBON ATOMS, PHENYL OR PHENYL SUBSTITUTED BY LOWER ALKYL AND R5 IS H, ALKYL OF 1 TO 6 CARBON ATOMS, CYCLOPENTYL OR ALKYL OF 1 TO 6 CARBON ATOMS, SUBSTITUTED BY PHENYL, LOWER ALKOXYPHENYL OR PHENOXY; OR PHYSIOLOGICALLY ACCEPTABLE ACID ADDTION SALTS THEREOF. THE COMPOUNDS POSSESS STIMULANT OR BLOCKING ACTIONS ON ADRENERGIC RECEPTORS.
Inventors
- 👤 David Hartley
- 👤 Lawrence Henry Charles Lunts
- 👤 David Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:21
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/04; C07C275/20; C07C275/24
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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |