Patent US2589296A successfully refreshed from Google Patents.
US2589296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-trihalomethyl-1, 3-dioxolane-4-carboxybenzoate and carboxyalkanoate
Assignee: GD Searle LLC
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Filing: 1950-06-02
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Granted: 1952-03-18
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Expires: 1970-06-02
Abstract
No abstract record available.
Inventors
- 👤 Elmer F Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:45
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/14; C07D317/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A 1,3-DIOXOLANE ESTER OF THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
7 words
A 1,3-DIOXOLANE ESTER OF 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) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |