US2438156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pile materials and production thereof
Assignee: Celanese Corp
•
Filing: 1943-06-05
•
Granted: 1948-03-23
•
Expires: 1963-06-05
Abstract
No abstract record available.
Inventors
- 👤 Frederick G Dodge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:14
CPC Classifications
D; D04; D04H; D04H11/00; B; B26; B26F; B26F3/00; B26F3/06; B26F3/08; B26F3/12; Y; Y10; Y10S; Y10S264/00; Y10S264/75; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054; Y10T156/12; Y10T156/1313; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T83/00; Y10T83/283; Y10T83/293
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-23 | 1951-09-22 | 1952-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-23 | 1955-09-22 | 1956-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-23 | 1959-09-22 | 1960-03-23 | $7700.00 | Window Closed / Lapsed |