US2701254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of isochromanylacetic acids and their derivatives
Assignee: BASF SE
•
Filing: 1953-06-19
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Granted: 1955-02-01
•
Expires: 1973-06-19
Abstract
No abstract record available.
Inventors
- 👤 Hopff Heinrich
- 👤 Maier Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:14
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
ISOCHROMANE DERIVATIVES OF THE GENERAL FORMULA
Claim 2
Dependent Claim
6 words
ISOCHROMANE DERIVATIVES OF THE GENERAL 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) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |