Patent US2875993A successfully refreshed from Google Patents.
Patent US2888451A successfully refreshed from Google Patents.
US2888451A
Expired / Lapsed
US
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3-arylazo derivatives of piperid-2-one-3-carboxylic acid esters and process for producing the same
Assignee: Bayer AG
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Filing: 1957-01-30
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Granted: 1959-05-26
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Expires: 1977-01-30
Abstract
No abstract record available.
Inventors
- 👤 Henecka Hans
- 👤 Lorenz Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:26
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/68; C07D211/72; C07D211/78; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3617
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A CHEMICAL COMPOUND REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
7 words
A CHEMICAL COMPOUND REPRESENTED BY 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) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |