Patent US3149108A successfully refreshed from Google Patents.
US3149108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of derivatives of 1, 4-benzodioxan
Assignee: Novartis Corp
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Filing: 1961-10-30
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Granted: 1964-09-15
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Expires: 1981-10-30
Abstract
No abstract record available.
Inventors
- 👤 Koo John
- 👤 Leonard Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:27
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/10; C07D319/14; C07D319/16; C07D319/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A PROCESS WHICH COMPRISES REFLUXING A CATECHOL OF THE FORMULA
Claim 2
Dependent Claim
10 words
A PROCESS WHICH COMPRISES REFLUXING A CATECHOL OF THE FORMULA
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |