Patent US2538764A successfully refreshed from Google Patents.
US2538764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acylamido-phenylpropanediols
Assignee: Parke Davis and Co LLC
•
Filing: 1949-02-12
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Granted: 1951-01-23
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Expires: 1969-02-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry M Crooks
- 👤 Mildred C Rebstock
- 👤 Controulis John
- 👤 Quentin R Bartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:59
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA,
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA,
Claim 3
Dependent Claim
5 words
A COMPOUND OF THE FORMULA,
Claim 4
Dependent Claim
5 words
A COMPOUND OF 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) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |