US2136424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of polymerization
Assignee: EIDP Inc
•
Filing: 1937-06-02
•
Granted: 1938-11-15
•
Expires: 1957-06-02
Abstract
No abstract record available.
Inventors
- 👤 Charles M Fields
- 👤 Reuben T Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:55
CPC Classifications
B; B29; B29C; B29C39/00; B29C39/003; B29C39/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-11-14 | 1942-05-16 | 1942-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-11-14 | 1946-05-16 | 1946-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-11-14 | 1950-05-16 | 1950-11-15 | $7700.00 | Window Closed / Lapsed |