US3526667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for acetal preparation
Assignee: United States Department of the Navy
•
Filing: 1962-02-15
•
Granted: 1970-09-01
•
Expires: 1982-02-15
Abstract
No abstract record available.
Inventors
- 👤 Marion E Hill
- 👤 Kathryn G Shipp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:24
CPC Classifications
C; C06; C06B; C06B43/00; C07; C07C; C07C205/00; C07C205/27; C07C205/28; C07C205/29; C07D; C07D319/00; C07D319/04; C07D319/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2519540A
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US2227128A
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US2297921A
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US2406713A
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US2415046A
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US2796423A
Cited
US2824141A
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US2816898A
Cited
US3129250A
Cited
US3291833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-31 | 1974-03-02 | 1974-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-31 | 1978-03-02 | 1978-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-31 | 1982-03-02 | 1982-09-01 | $7700.00 | Window Closed / Lapsed |