US2446121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions of polymeric plasticizers and organic plastic materials
Assignee: Shell Development Co
•
Filing: 1944-10-10
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Granted: 1948-07-27
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Expires: 1964-10-10
Abstract
No abstract record available.
Inventors
- 👤 David E Adelson
- 👤 Dannenberg Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:55
CPC Classifications
C; C08; C08L; C08L31/00; C08L31/02; C08L1/00; C08L1/08; C08L1/16; C08L1/18
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) | 1951-07-27 | 1952-01-26 | 1952-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-27 | 1956-01-26 | 1956-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-27 | 1960-01-26 | 1960-07-27 | $7700.00 | Window Closed / Lapsed |