Patent US2915550A successfully refreshed from Google Patents.
US2915550A
Expired / Lapsed
US
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Method for preparing alkylene glycol dicarbamates
Assignee: Jefferson Chemical Co Inc
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Filing: 1957-07-29
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Granted: 1959-12-01
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Expires: 1977-07-29
Abstract
No abstract record available.
Inventors
- 👤 Jr John Barr Bell
- 👤 Currier Vernon Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:55
CPC Classifications
C; C07; C07C; C07C271/00; C07C271/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A METHOD FOR PREPARING AN ALKYLENE GLYCOL DICARBAMATE WHICH COMPRISES HEATING A B-HYDROXYALKYL CARBAMATE REPRESENTED BY THE FORMULA:
Claim 2
Independent Claim
18 words
A METHOD FOR PREPARING AN ALKYLENE GLYCOL DICARBAMATE WHICH COMPRISES HEATING A B-HYDROXYALKYL CARBAMATE REPRESENTED BY THE FORMULA:
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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |