Patent US5794899A successfully refreshed from Google Patents.
Patent US3189654A successfully refreshed from Google Patents.
US3189654A
Expired / Lapsed
US
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Process for the preparation of 1, 2-cycloalkanediones
Assignee: EIDP Inc
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Filing: 1961-11-15
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Granted: 1965-06-15
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Expires: 1981-11-15
Abstract
No abstract record available.
Inventors
- 👤 Arthur Wilfred John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:50
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/28; C07C49/00; C07C49/385; C07C49/587; C07C49/647
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A PROCESS FOR THE PREPARATION OF A 1,2-CYCLOALKANEDIONE WHICH COMPRISES DISPERSING 1-OXO-2-NITRATOCYCLOALKANE IN AN AQUEOUS SOLUTION OF A STRONG BASE BY VIGOROUS AGITATION AT A TEMPERATURE IN THE RANGE OF 20*-25*C.
Claim 2
Dependent Claim
31 words
A PROCESS FOR THE PREPARATION OF A 1,2-CYCLOALKANEDIONE WHICH COMPRISES DISPERSING 1-OXO-2-NITRATOCYCLOALKANE IN AN AQUEOUS SOLUTION OF A STRONG BASE BY VIGOROUS AGITATION AT A TEMPERATURE IN THE RANGE OF 20*-25*C.
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) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |