US3337523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic monoazo and disazo dyestuffs containing a hydrazinium group
Assignee: Sandoz AG
•
Filing: 1966-04-29
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Granted: 1967-08-22
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Expires: 1986-04-29
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 14:39
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; C09B43/00; C09B44/00; C09B44/02; C09B44/04; C09B51/00; C09B62/00; C09B62/44; C09B62/62; C09B62/66; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/919; 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |