US2967880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbamic acid glycol esters
Assignee: C.H. Boehringer Sohn AG and Co KG
•
Filing: 1958-10-16
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Granted: 1961-01-10
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Expires: 1978-10-16
Abstract
No abstract record available.
Inventors
- 👤 Finke Otto
- 👤 Zeile Karl
- 👤 Koppe Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:27
CPC Classifications
C; C07; C07C; C07C271/00; C07C271/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
THE LEVO-ENANTIOMORPHS, SUBSTANTIALLY FREE FROM THEIR OPTICAL ANTIPODES, OF CARBAMIC ACID ESTERS HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
16 words
THE LEVO-ENANTIOMORPHS, SUBSTANTIALLY FREE FROM THEIR OPTICAL ANTIPODES, OF CARBAMIC ACID ESTERS HAVING THE STRUCTURAL 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) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |