Patent US3729519A successfully refreshed from Google Patents.
US3729519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of alkyl substituted resorcinols
Assignee: F Hoffmann La Roche AG
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Filing: 1971-09-17
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Granted: 1973-04-24
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Expires: 1991-09-17
Abstract
Abstract PREPARATION OF 5-ALKYL SUBSTITUTED RESORCINOLS SUCH AS OLIVETOL FROM ALIPHATIC ALDEHYDE AND INTERMEDIATES IN THIS PROCESS.
Inventors
- 👤 S Teitel
- 👤 A Brossi
- 👤 A Focella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:05
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/05; C07C41/06; C07C37/00; C07C37/06; C07C37/07; C07C37/50; C07C43/00; C07C43/02; C07C43/20; C07C43/205; C07C43/2055; C07C45/00; C07C45/61; C07C45/63; C07C45/65; C07C45/66; C07C45/67; C07C45/673; C07C45/676; C07C45/68; C07C45/70; C07C45/71; C07C45/72; C07C45/74
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |