US2438612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of tetraallylsilane
Assignee: Ellis Foster Co
•
Filing: 1944-09-26
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Granted: 1948-03-30
•
Expires: 1964-09-26
Abstract
No abstract record available.
Inventors
- 👤 Charles A Mackenzie
- 👤 John B Rust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:56
CPC Classifications
C; C08; C08F; C08F230/00; C08F230/04; C08F230/08; C08F230/085
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) | 1951-03-30 | 1951-09-29 | 1952-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-30 | 1955-09-29 | 1956-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-30 | 1959-09-29 | 1960-03-30 | $7700.00 | Window Closed / Lapsed |