Patent US3082227A successfully refreshed from Google Patents.
US3082227A
Expired / Lapsed
US
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Method of preparing a quaternary ammonium compound
Assignee: Wyeth Holdings LLC
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Filing: 1961-09-27
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Granted: 1963-03-19
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Expires: 1981-09-27
Abstract
No abstract record available.
Inventors
- 👤 Allan E Sherr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:58
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
THE METHOD OF PREPARING A QUATERNARY AMMONIUM COMPOUND REPRESENTED BY THE FORMULA
Claim 2
Independent Claim
12 words
THE METHOD OF PREPARING A QUATERNARY AMMONIUM COMPOUND REPRESENTED BY 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) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |