US3049438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyridotriazole brighteners
Assignee: Wyeth Holdings LLC
•
Filing: 1958-11-03
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Granted: 1962-08-14
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Expires: 1978-11-03
Abstract
No abstract record available.
Inventors
- 👤 Bennett G Buell
- 👤 Robert S Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:35
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04; D; D06; D06L; D06L4/00; D06L4/60; D06L4/614; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
ORGANIC FIBERS TREATED WITH COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF (1) COMPOUNDS OF THE STRUCTURE:
Claim 2
Dependent Claim
16 words
ORGANIC FIBERS TREATED WITH COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF (1) COMPOUNDS OF THE STRUCTURE:
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) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |