US2422802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydration of diacetone glycol to form a methyl pentadiene
Assignee: Shell Development Co
•
Filing: 1944-01-03
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Granted: 1947-06-24
•
Expires: 1964-01-03
Abstract
No abstract record available.
Inventors
- 👤 William T Schelling
- 👤 Anderson John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:02
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/12; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/93; Y10S585/934
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH137387A
Cited
US1844899A
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US2184164A
Cited
US2315995A
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US2242575A
Cited
US2174280A
Cited
US2381506A
Cited
US2371530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-23 | 1950-12-23 | 1951-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-23 | 1954-12-23 | 1955-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-23 | 1958-12-23 | 1959-06-24 | $7700.00 | Window Closed / Lapsed |