US2444333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of thermosetting synthetic resins by the polymerization of alkylene oxide derivatives
Assignee: De Trey Freres S A
•
Filing: 1944-05-02
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Granted: 1948-06-29
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Expires: 1964-05-02
Abstract
No abstract record available.
Inventors
- 👤 Pierre Castan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:12
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/20; Y; Y10; Y10S; Y10S273/00; Y10S273/03
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) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |