US3132178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing auramine using urea
Assignee: Wyeth Holdings LLC
•
Filing: 1961-04-04
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Granted: 1964-05-05
•
Expires: 1981-04-04
Abstract
No abstract record available.
Inventors
- 👤 Robert G Weyker
- 👤 Robert M Yarrington
- 👤 Ber Samuel M Ger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:39
CPC Classifications
C; C09; C09B; C09B11/00; C09B11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
IN THE PROCESS FOR THE PREPARATION OF A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
12 words
IN THE PROCESS FOR THE PREPARATION OF A COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |