US3231584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-phenyl-3, 3-dimethylspiro[(2'h-1'-benzopyran)-2', 2'-indoline] compound
Assignee: NCR Voyix Corp
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Filing: 1962-05-01
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Granted: 1966-01-25
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Expires: 1982-05-01
Abstract
No abstract record available.
Inventors
- 👤 Berman Elliot
- 👤 John E G Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:42
CPC Classifications
C; C07; C07D; C07D491/00; C07D491/02; C07D491/10; G; G03; G03C; G03C1/00; G03C1/685
Claims Analysis
Total Claims: 0
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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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |