Patent US3110729A successfully refreshed from Google Patents.
US3110729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making cyclo-butane-1, 2-dicarboxamide
Assignee: Standard Oil Co
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Filing: 1962-08-03
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Granted: 1963-11-12
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Expires: 1982-08-03
Abstract
No abstract record available.
Inventors
- 👤 Janice L Greene
- 👤 Jr James D Idol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:19
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE METHOD OF PREPARING CYCLO-BUTANE-1,2-DICARBOXAMIDE, WHICH COMPRISES THE STEPS OF REACTING CYCLO-BUTANE1,2-DICYANIDE WITH THE MONOHYDRATE OF SULPHURIC ACID TO FORM AN ADDUCT, SAID REACTION BEING CONTINUED FOR FROM 15 MINUTES TO FOUR HOURS AT A TEMPERATURE OF 40 TO 125* C., COOLING TO AMBEINT TEMPERATURE, REACTING SAID ADDUCT WITH A BASE IN SOLUTION, AND RECOVERING THE PRECIPITATED DICARBOXAMIDE.
Claim 2
Independent Claim
58 words
THE METHOD OF PREPARING CYCLO-BUTANE-1,2-DICARBOXAMIDE, WHICH COMPRISES THE STEPS OF REACTING CYCLO-BUTANE1,2-DICYANIDE WITH THE MONOHYDRATE OF SULPHURIC ACID TO FORM AN ADDUCT, SAID REACTION BEING CONTINUED FOR FROM 15 MINUTES TO FOUR HOURS AT A TEMPERATURE OF 40 TO 125* C., COOLING TO AMBEINT TEMPERATURE, REACTING SAID ADDUCT WITH A BASE IN SOLUTION, AND RECOVERING THE PRECIPITATED DICARBOXAMIDE.
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) | 1966-11-11 | 1967-05-13 | 1967-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-11 | 1971-05-13 | 1971-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-11 | 1975-05-13 | 1975-11-12 | $7700.00 | Window Closed / Lapsed |