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US1885878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Identifiable material and method of making the same
Assignee: Celanese Corp
•
Filing: 1928-07-27
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Granted: 1932-11-01
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Expires: 1948-07-27
Abstract
No abstract record available.
Inventors
- 👤 Whitehead William
- 👤 Kuhl Henry Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:40
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/24; D01F2/28
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) | 1935-11-01 | 1936-05-02 | 1936-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-11-01 | 1940-05-02 | 1940-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-11-01 | 1944-05-02 | 1944-11-01 | $7700.00 | Window Closed / Lapsed |