Patent US3525754A successfully refreshed from Google Patents.
US3525754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 3-oxabicyclo(3.1.1)heptane-2-one
Assignee: EIDP Inc
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Filing: 1966-12-30
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Granted: 1970-08-25
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Expires: 1986-12-30
Abstract
No abstract record available.
Inventors
- 👤 Gilbert H Berezin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:33
CPC Classifications
C; C07; C07D; C07D311/00; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/199
Claims Analysis
Total Claims: 0
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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) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |