Patent US2530348A successfully refreshed from Google Patents.
US2530348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogenated derivatives of aliphatic acids, lactones and method of making same
Assignee: Dow Chemical Co
•
Filing: 1946-11-07
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Granted: 1950-11-14
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Expires: 1966-11-07
Abstract
No abstract record available.
Inventors
- 👤 Edgar C Britton
- 👤 Weele John C Vander
- 👤 John E Livak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:30
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C07C; C07C51/00; C07C51/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
THE GAMMA LACTONE OF AN OTHERWISE UNSUBSTITUTED ALPHA-HALO-GAMMA-HYDROXY-BUTYRIC ACID.
Claim 2
Dependent Claim
9 words
THE GAMMA LACTONE OF AN OTHERWISE UNSUBSTITUTED ALPHA-HALO-GAMMA-HYDROXY-BUTYRIC ACID.
References Cited (Backward Citations)
US1757100A
Cited
US2193858A
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US2365808A
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US2368366A
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US2421729A
Cited
US2390526A
Cited
US2411875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |