US2837560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of organic dicarbamates
Assignee: Berkeley Chemical Corp
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Filing: 1956-01-23
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Granted: 1958-06-03
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Expires: 1976-01-23
Abstract
No abstract record available.
Inventors
- 👤 Beinfest Sidney
- 👤 Adams Phillip
- 👤 Halpern Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:59
CPC Classifications
C; C07; C07C; C07C271/00; C07C271/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR PREPARING A LOWER ALKANEDIOL DICARBAMATE WHICH COMPRISES REACTING UREA WITH A LOWER AALKANEDIOL AT A TEMPERATURE IN THE RANGE OF ABOUT 100* TO 180*C. IN A REACTION ZONE IN THE PRESENCE OF AN ALKANOL REACTIVE SOLVENT HAVING A BOILING POINT IN THE RANGE OF 64 TO 150*C. AND AN ALUMINUM ALKOXIDE DERIVED FROM AN ALKANOL HAVING BOILING POINT IN THE RANGE OR 64* TO 150*C.
Claim 2
Dependent Claim
68 words
A PROCESS FOR PREPARING A LOWER ALKANEDIOL DICARBAMATE WHICH COMPRISES REACTING UREA WITH A LOWER AALKANEDIOL AT A TEMPERATURE IN THE RANGE OF ABOUT 100* TO 180*C. IN A REACTION ZONE IN THE PRESENCE OF AN ALKANOL REACTIVE SOLVENT HAVING A BOILING POINT IN THE RANGE OF 64 TO 150*C. AND AN ALUMINUM ALKOXIDE DERIVED FROM AN ALKANOL HAVING BOILING POINT IN THE RANGE OR 64* TO 150*C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |