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Patent US3422141A successfully refreshed from Google Patents.
US3422141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3,4-dihydroxyphenylalkanamides
Assignee: Hassle AB
•
Filing: 1967-03-23
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Granted: 1969-01-14
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Expires: 1987-03-23
Abstract
No abstract record available.
Inventors
- 👤 Hans Rudolf Corrodi
- 👤 Per Arvid Emil Carlsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:37
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2669583A
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US2385940A
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US2704713A
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US3061553A
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US3013057A
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US3188349A
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US3024166A
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US3036955A
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US3036128A
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US3190916A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |