Patent US3336330A successfully refreshed from Google Patents.
US3336330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain dibenzoxazolylnaphthalene compounds
Assignee: Hoechst AG
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Filing: 1965-04-26
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Granted: 1967-08-15
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Expires: 1985-04-26
Abstract
No abstract record available.
Inventors
- 👤 Schinzel Erich
- 👤 Frischkorn Hans
- 👤 Behrenbruch Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:02
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/52; C07D263/62; C07D263/64; D; D06; D06L; D06L4/00; D06L4/60; D06L4/614; D06L4/636
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)
US3005779A
Cited
AT196343B
Cited
US2985661A
Cited
US2995564A
Cited
US3135762A
Cited
US3137655A
Cited
US3250780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |