Patent US1246127A successfully refreshed from Google Patents.
Patent US3096373A successfully refreshed from Google Patents.
US3096373A
Expired / Lapsed
US
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N, n'-bis (di-lower-alkylamino-loweralkyl) dicarboxylic acid amides
Assignee: STWB Inc
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Filing: 1956-04-30
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Granted: 1963-07-02
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Expires: 1976-04-30
Abstract
No abstract record available.
Inventors
- 👤 Frederick K Kirchner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:17
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
62 words
A COMPOUND HAVING THE FORMULA R-(1,2-PHENYLENE)-CH2-N(=B)(-X)-A-NH-CO-CO-NH-A''-N(-X) (=B'')-CH2-(1,2-PHENYLENE)-R'' WHEREIN R AND R'' ARE HALOGEN ATOMS, A AND A'' ARE LOWER-ALYYLENE RADICALS, N=B AND N=B'' ARE DI-LOWER ALKYLAMINO RADICALS IN WHICH THE ALKYL GROUPS EACH HAVE AT LEAST TWO CARBON ATOMS, X AND X'' ARE ANIONSM, AND THE TRETIARY-AMINE NITROGENS AND THE AMIDE NITROGENS ARE ATTACHED TO DIFFERENT CARBON ATOMS OF A AND A''.
References Cited (Backward Citations)
US2653898A
Cited
US2624763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |