US2993055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
8-tert-butyl-1, 4-dioxaspiro[4.5]-decane
Assignee: Dow Chemical Co
•
Filing: 1958-10-02
•
Granted: 1961-07-18
•
Expires: 1978-10-02
Abstract
No abstract record available.
Inventors
- 👤 Henry E Hennis
- 👤 Earl H Rosenbrock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:45
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/72; C11; C11B; C11B9/00; C11B9/0069; C11B9/0073; C11B9/0088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2095320A
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CA546650A
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US1882200A
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FR747423A
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US2265437A
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GB595963A
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US2730529A
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GB754968A
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GB802022A
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US2861080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |