US2446314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of soluble polymers of unsaturated esters of polycarboxylic acids
Assignee: Shell Development Co
•
Filing: 1944-05-15
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Granted: 1948-08-03
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Expires: 1964-05-15
Abstract
No abstract record available.
Inventors
- 👤 John K Wagers
- 👤 Edward C Shokal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:33
CPC Classifications
C; C09; C09D; C09D131/00; C09D131/06; C09D131/08; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F18/08; Y; Y10; Y10S; Y10S260/00; Y10S260/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2273891A
Cited
US2377095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-03 | 1952-02-02 | 1952-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-03 | 1956-02-02 | 1956-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-03 | 1960-02-02 | 1960-08-03 | $7700.00 | Window Closed / Lapsed |