US2434981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic polyhydroxy compounds and derivatives
Assignee: Celanese Corp
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Filing: 1944-09-19
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Granted: 1948-01-27
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Expires: 1964-09-19
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Bludworth
- 👤 Donald P Easter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:44
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/14; C07C403/16; C07C45/00; C07C45/61; C07C45/64; C07C45/67; C07C45/68; C07C45/70; C07C45/71; C07C49/00; C07C49/04; C07C49/17; C07C49/172; C07C49/175; C07C49/20; C07C49/255; C08; C08K; C08K5/00; C08K5/04; C08K5/07; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-26 | 1951-07-28 | 1952-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-26 | 1955-07-28 | 1956-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-26 | 1959-07-28 | 1960-01-27 | $7700.00 | Window Closed / Lapsed |