US2421729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 3-aryl-1, 5-dibrompentane-3-carboxylic acid
Assignee: SmithKline Beecham Corp
•
Filing: 1944-04-14
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Granted: 1947-06-03
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Expires: 1964-04-14
Abstract
No abstract record available.
Inventors
- 👤 Walton Eric
- 👤 Berkeley Maurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:23
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/263; C07D207/27; C07C; C07C51/00; C07C51/08; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/60; C07D211/62; C07D211/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB550963A
Cited
US2328232A
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US1972340A
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US2079962A
Cited
DE682078C
Cited
US2212056A
Cited
US2365808A
Cited
GB550970A
Cited
US2382285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-02 | 1950-12-02 | 1951-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-02 | 1954-12-02 | 1955-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-02 | 1958-12-02 | 1959-06-03 | $7700.00 | Window Closed / Lapsed |