US2587641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-p-nitrophenyl-2-dihaloacetamidopropane-1, 3-diol cyclic carbonate and sulfite
Assignee: Parke Davis and Co LLC
•
Filing: 1950-05-25
•
Granted: 1952-03-04
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Expires: 1970-05-25
Abstract
No abstract record available.
Inventors
- 👤 George W Moersch
- 👤 Allen C Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:52
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A COMPOUND OF THE CLASS CONSISTING OF THE (DL) -$ AND (1) -$ FORMS OF A COMPOUND OF THE FORMULA,
Claim 2
Dependent Claim
20 words
A COMPOUND OF THE CLASS CONSISTING OF THE (DL) -$ AND (1) -$ FORMS OF A COMPOUND OF THE FORMULA,
References Cited (Backward Citations)
US2471274A
Cited
US2513346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |