Patent US2385632A successfully refreshed from Google Patents.
Patent US3259635A successfully refreshed from Google Patents.
US3259635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
7-hydroxy coumarin derivative
Assignee: Cassella Farbwerke Mainkur AG
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Filing: 1964-05-05
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Granted: 1966-07-05
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Expires: 1984-05-05
Abstract
No abstract record available.
Inventors
- 👤 Ritter Heinrich
- 👤 Beyerle Rudi
- 👤 Nitz Rolf-Eberhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:25
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/06; C07D311/08; C07D311/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND 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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |