US2435566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peroxide bleaching of ground wood
Assignee: West Virginia Pulp and Paper Co
•
Filing: 1944-10-16
•
Granted: 1948-02-10
•
Expires: 1964-10-16
Abstract
No abstract record available.
Inventors
- 👤 Daniel O Adams
- 👤 George B Hughey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:33
CPC Classifications
B; B27; B27K; B27K5/00; B27K5/02; B27K3/00; B27K3/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US200085A
Cited
US223670A
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US263797A
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US1052675A
Cited
GB101475A
Cited
US1539433A
Cited
GB296547A
Cited
GB298333A
Cited
US1843467A
Cited
US2187016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-09 | 1951-08-11 | 1952-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-09 | 1955-08-11 | 1956-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-09 | 1959-08-11 | 1960-02-10 | $7700.00 | Window Closed / Lapsed |