US2517543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetals of 2-oxy-tetrahydropyran and tetrahydrofuran-3-aldehydes and process of preparing the same
Assignee: GAF Chemicals Corp
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Filing: 1948-11-05
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Granted: 1950-08-08
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Expires: 1968-11-05
Abstract
No abstract record available.
Inventors
- 👤 John W Copenhaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:01
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/02; C07D309/08; C07D309/10; C07D309/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
17 words
ACETALS SELECTED FROM THE GROUP CONSISTING OF LOWER ALKOXY ACETALS OR 2-LOWER ALKOXY TETRAHYDROPYRAN AND TETRAHYDROFURAN 3-ALDEHYDES.
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) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |