Patent US3173907A successfully refreshed from Google Patents.
US3173907A
Expired / Lapsed
US
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Quaternized n-alkylated arylazoimidazoles
Assignee: Wyeth Holdings LLC
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Filing: 1959-11-27
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Granted: 1965-03-16
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Expires: 1979-11-27
Abstract
No abstract record available.
Inventors
- 👤 Klingsberg Erwin
- 👤 Charles E Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:38
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/0025; C09B31/00; C09B31/02; C09B31/04; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND 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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |