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US3455922A
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Basic perinone dyestuffs containing condensed heterocyclic ring system
Assignee: BASF Schweiz AG
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Filing: 1966-08-10
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Granted: 1969-07-15
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Expires: 1986-08-10
Abstract
No abstract record available.
Inventors
- 👤 Gert Hegar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:01
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/06; C07D487/00; C07D487/02; C07D487/04; C07D487/06; C09; C09B; C09B57/00; C09B57/12; C09B69/00; C09B69/001; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
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) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |