US2442332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of wood pulp
Assignee: Celanese Corp
•
Filing: 1943-07-27
•
Granted: 1948-06-01
•
Expires: 1963-07-27
Abstract
No abstract record available.
Inventors
- 👤 Clifford I Haney
- 👤 Mervin E Martin
- 👤 Daniel L Sherk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:03
CPC Classifications
C; C08; C08B; C08B3/00; C08B3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2135980A
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US2151412A
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US2315973A
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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) | 1951-06-01 | 1951-12-01 | 1952-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-01 | 1955-12-01 | 1956-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-01 | 1959-12-01 | 1960-06-01 | $7700.00 | Window Closed / Lapsed |