Patent US2234246A successfully refreshed from Google Patents.
US2234246A
Expired / Lapsed
US
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Metallic composition
Assignee: Celanese Corp
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Filing: 1938-11-26
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Granted: 1941-03-11
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Expires: 1958-11-26
Abstract
No abstract record available.
Inventors
- 👤 Groombridge Walter Henry
- 👤 Newns John Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:54
CPC Classifications
C; C07; C07C; C07C9/00; C07C9/02; C07C9/04; B; B01; B01J; B01J23/00; B01J23/70; B01J23/72; C22; C22C; C22C38/00; C22C38/08
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) | 1944-03-10 | 1944-09-09 | 1945-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-03-10 | 1948-09-09 | 1949-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-03-10 | 1952-09-09 | 1953-03-11 | $7700.00 | Window Closed / Lapsed |