Patent US2242087A successfully refreshed from Google Patents.
US2242087A
Expired / Lapsed
US
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Papermaking pulp mixture and method of producing the same
Assignee: West Virginia Pulp and Paper Co
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Filing: 1933-07-11
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Granted: 1941-05-13
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Expires: 1953-07-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Plumstead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:41
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; D21H17/675; C; C01; C01P; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/60
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) | 1944-05-12 | 1944-11-11 | 1945-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-05-12 | 1948-11-11 | 1949-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-05-12 | 1952-11-11 | 1953-05-13 | $7700.00 | Window Closed / Lapsed |