US2493710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbamic acid esters
Assignee: F Hoffmann La Roche AG
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Filing: 1947-03-21
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Granted: 1950-01-03
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Expires: 1967-03-21
Abstract
No abstract record available.
Inventors
- 👤 John A Aeschlimann
- 👤 Stempel Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:05
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/20; C07D295/205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A COMPOUND OF THE GROUP CONSISTING OF DIMETHYL CARBAMIC ACID ESTERS OF PHENOLIC PRIMARY ALKYLAMINES AND PHENOLIC SECONDARY ALKYLAMINES, AND THE SALTS THEREOF.
Claim 2
Dependent Claim
23 words
A COMPOUND OF THE GROUP CONSISTING OF DIMETHYL CARBAMIC ACID ESTERS OF PHENOLIC PRIMARY ALKYLAMINES AND PHENOLIC SECONDARY ALKYLAMINES, AND THE SALTS THEREOF.
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) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |