Patent US3252967A successfully refreshed from Google Patents.
US3252967A
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Azo basic dyes
Assignee: Sandoz AG
•
Filing: 1962-04-19
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Granted: 1966-05-24
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Expires: 1982-04-19
Abstract
No abstract record available.
Inventors
- 👤 Entschel Roland
- 👤 Mueller Curt
- 👤 Wehrli Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:54
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/001; C09B69/002; B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; C08; C08K; C08K5/00; C08K5/0008; C08K5/0041; C08K5/16; C08K5/29; C09B1/00; C09B1/002; C09B1/16; C09B1/20; C09B1/26; C09B1/28; C09B1/32; C09B1/50; C09B1/51; C09B1/54; C09B1/542; C09B25/00; C09B43/00; C09B43/40; C09B44/00; C09B44/02; C09B44/04; C09B51/00; C09B62/00; C09B62/44; C09B62/62; C09B62/66; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A BASIC DYESTUFF OF THE FORMULA:
Claim 2
Dependent Claim
6 words
A BASIC DYESTUFF OF THE FORMULA:
References Cited (Backward Citations)
US2357317A
Cited
US2955108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |