US3310362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentrated brown dye solution
Assignee: Wyeth Holdings LLC
•
Filing: 1965-06-29
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Granted: 1967-03-21
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Expires: 1985-06-29
Abstract
No abstract record available.
Inventors
- 👤 Fiess Norman William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:20
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/28; C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0075; C09B67/0076
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
AN AQUEOUS DYE SOLUTION COMPRISING ON A WEIGHT BASIS (A) 10-30% OF C.I. 21,010, (B) 10-20% OF SULFAMIC ACID, AND (C) 5-15% OF AN ALKANOIC ACID OF 1-3 CARBON ATOMS.
Claim 2
Dependent Claim
30 words
AN AQUEOUS DYE SOLUTION COMPRISING ON A WEIGHT BASIS (A) 10-30% OF C.I. 21,010, (B) 10-20% OF SULFAMIC ACID, AND (C) 5-15% OF AN ALKANOIC ACID OF 1-3 CARBON ATOMS.
References Cited (Backward Citations)
GB495782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |