US2370779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 2-methyl-4-keto-1, 3-dioxolane
Assignee: EIDP Inc
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Filing: 1942-10-30
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Granted: 1945-03-06
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Expires: 1962-10-30
Abstract
No abstract record available.
Inventors
- 👤 Conaway Rollin Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:00
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/156; C08K5/1565; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/34
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) | 1948-03-05 | 1948-09-04 | 1949-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-03-05 | 1952-09-04 | 1953-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-03-05 | 1956-09-04 | 1957-03-06 | $7700.00 | Window Closed / Lapsed |