US2476859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing acid anhydrides and acetone
Assignee: Eastman Kodak Co
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Filing: 1948-02-07
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Granted: 1949-07-19
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Expires: 1968-02-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh J Hagemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:47
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/185; C07C59/19; C07C45/00; C07C45/61; C07C45/67; C07C45/76; C07C51/00; C07C51/54; C07C51/56; C07C53/00; C07C53/124; C07C53/15; C07C53/16; C07C55/00; C07C55/02; C07C55/10; C07C57/00; C07C57/02; C07C57/03; C07C57/04; C07C57/08; C07C63/00; C07C63/04; C07C63/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2019983A
Cited
US2235561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |