Patent US2944074A successfully refreshed from Google Patents.
US2944074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of 2-carbamylphenyl phosphate
Assignee: F Hoffmann La Roche AG
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Filing: 1957-05-20
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Granted: 1960-07-05
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Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 Atherton Frank Ratcliffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:39
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/6574; C07F9/65744; C07F9/06; C07F9/08; C07F9/09; C07F9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A MEMBER OF THE GROUP CONSISTING OF COMPOUNDS REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
12 words
A MEMBER OF THE GROUP CONSISTING OF COMPOUNDS REPRESENTED BY THE FORMULA
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) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |