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US2485239A
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Polymers containing recurring aldehyde groups and derivatives thereof and process for preparing same
Assignee: EIDP Inc
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Filing: 1945-03-06
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Granted: 1949-10-18
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Expires: 1965-03-06
Abstract
No abstract record available.
Inventors
- 👤 Izard Emmette Farr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:24
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/12; C08F218/00; C08F218/02; C08F218/04; C08F218/08; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US1970510A
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GB356408A
Cited
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Cited
GB369313A
Cited
US2178523A
Cited
US2375564A
Cited
US2417404A
Cited
US2404929A
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US2383793A
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US2443167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-17 | 1953-04-18 | 1953-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-17 | 1957-04-18 | 1957-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-17 | 1961-04-18 | 1961-10-18 | $7700.00 | Window Closed / Lapsed |