Patent US2566535A successfully refreshed from Google Patents.
US2566535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium salts of tertiary-aminoalkyl substituted phenylacetonitriles
Assignee: STWB Inc
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Filing: 1949-01-27
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Granted: 1951-09-04
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Expires: 1969-01-27
Abstract
No abstract record available.
Inventors
- 👤 Ruddy Arlo Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:35
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/14; C07D295/145; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A QUATERNARY AMMONIUM SALT OF THE FORMULA
Claim 2
Dependent Claim
7 words
A QUATERNARY AMMONIUM SALT OF THE FORMULA
References Cited (Backward Citations)
US2405555A
Cited
FR728241A
Cited
US2032097A
Cited
US2109024A
Cited
US2113606A
Cited
FR884569A
Cited
US2446804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |