US2450234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Autocondensation polymers of unsaturated glycidyl ethers and method of producing same
Assignee: Shell Development Co
•
Filing: 1943-12-07
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Granted: 1948-09-28
•
Expires: 1963-12-07
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Evans
- 👤 Edward C Shokal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:03
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2089569A
Cited
GB421867A
Cited
GB499879A
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US2258892A
Cited
US2201074A
Cited
US2273891A
Cited
US2343053A
Cited
US2332895A
Cited
US2314039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-28 | 1952-03-29 | 1952-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-28 | 1956-03-29 | 1956-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-28 | 1960-03-29 | 1960-09-28 | $7700.00 | Window Closed / Lapsed |