Patent US3374221A successfully refreshed from Google Patents.
US3374221A
Expired / Lapsed
US
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Basic dyes
Assignee: Sandoz AG
•
Filing: 1966-06-02
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Granted: 1968-03-19
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Expires: 1986-06-02
Abstract
No abstract record available.
Inventors
- 👤 Entschel Roland
- 👤 Mueller Curt
- 👤 Wehrli Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:02
CPC Classifications
C; C09; C09B; C09B44/00; C09B44/02; C09B44/04; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
THE BASIC DYESTUFF OF THE FORMULA:
Claim 2
Dependent Claim
6 words
THE BASIC DYESTUFF 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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |