US3282938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-tertiary aminoloweralkyl-4-lower alkyl or phenyl-7-lower carbalkoxy lower alkyl or carboxy lower alkyl coumarins
Assignee: Cassella Farbwerke Mainkur AG
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Filing: 1962-07-26
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Granted: 1966-11-01
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Expires: 1982-07-26
Abstract
No abstract record available.
Inventors
- 👤 Ritter Heinrich
- 👤 Hanau Kreis
- 👤 Beyerle Rudi
- 👤 Nitz Rolf-Eberhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:19
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
6 words
3-B-MORPHOLINOETHYL-4-METHYL-COUMARIN-7-ETHYL OXYACETATE HAVING THE FORMULA 3-((MORPHOLINO)-C2H4-),4-CH3,7-(C2H5-OOC-CH2-O-)
Claim 2
Dependent Claim
59 words
A COMPOUND OF THE FORMULA 3-R1,4-R2,7-(R3-O-)-2H-CHROMEN-2-ONE 2H-CHROMEN-2-ONE WHEREIN R1 IS SELECTED FROM THE GROUP CONSISTING OF PIPERIDINO LOWER ALKYL, MORPHOLINO LOWER ALKYL, PYRROLIDINO LOWER ALKYL AND LOWER DIALKYLAMINO LOWER ALKYL; R2 IS SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL AND PHENYL; AND R3 IS SELECTED FROM THE GROUP CONSISTING OF LOWER CARBALKOXY LOWER ALKYL AND CARBOXY LOWER ALKYL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |