Patent US1625464A successfully refreshed from Google Patents.
Patent US2478154A successfully refreshed from Google Patents.
US2478154A
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US
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Polymeric aldehyde diesters and production thereof
Assignee: Shell Development Co
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Filing: 1944-10-23
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Granted: 1949-08-02
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Expires: 1964-10-23
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:10
CPC Classifications
C; C08; C08F; C08F246/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1625852A
Cited
DE449115C
Cited
US1746665A
Cited
GB340008A
Cited
DE592233C
Cited
GB369313A
Cited
US2178523A
Cited
US2312193A
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US2341334A
Cited
US2341306A
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US2356767A
Cited
US2332896A
Cited
US2417404A
Cited
US2404929A
Cited
US2400727A
Cited
US2443167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |