Patent US3946993A successfully refreshed from Google Patents.
Patent US2510784A successfully refreshed from Google Patents.
US2510784A
Expired / Lapsed
US
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Bis (tertiaryaminoalkyl) arylacetonitriles and the corresponding acids and esters
Assignee: STWB Inc
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Filing: 1949-01-13
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Granted: 1950-06-06
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Expires: 1969-01-13
Abstract
No abstract record available.
Inventors
- 👤 Lucas Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:20
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
30 words
A COMPOUND OF THE GROUP CONSISTING OF ALPHA,ALPHA - BIS (TERTIARY-AMINOALKYL) ARYLACETIC ACIDS, THE CORRESPONDING NITRILES, THE CORRESPONDING LOWER ALKYL ESTERS AND THE SALTS OF SAID ACIDS, NITRILES AND ESTERS.
References Cited (Backward Citations)
US2398575A
Cited
US2370015A
Cited
US2185661A
Cited
US2230774A
Cited
GB552065A
Cited
US2382285A
Cited
US2428535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-05 | 1953-12-05 | 1954-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-05 | 1957-12-05 | 1958-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-05 | 1961-12-05 | 1962-06-06 | $7700.00 | Window Closed / Lapsed |