US3222371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyridotriazole brighteners
Assignee: Wyeth Holdings LLC
•
Filing: 1962-04-19
•
Granted: 1965-12-07
•
Expires: 1982-04-19
Abstract
No abstract record available.
Inventors
- 👤 Buell Bennett George
- 👤 Long Robert Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:16
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04; D; D06; D06L; D06L4/00; D06L4/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
12 words
COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF (1) THOSE HAVING THE FORMULA:
Claim 2
Dependent Claim
12 words
COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF (1) THOSE HAVING THE FORMULA:
Claim 3
Dependent Claim
5 words
THE COMPOUND OF THE FORMULA:
Claim 4
Dependent Claim
5 words
THE COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
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Cited
US2647904A
Cited
US2462405A
Cited
US2637731A
Cited
US2624740A
Cited
US2824876A
Cited
US2845425A
Cited
US3058989A
Cited
US2973365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |