US2506882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for diluting and washing pulp solutions and like materials
Assignee: WR Grace and Co
•
Filing: 1945-09-19
•
Granted: 1950-05-09
•
Expires: 1965-09-19
Abstract
No abstract record available.
Inventors
- 👤 Gaston J Lipscomb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:57
CPC Classifications
B; B04; B04B; B04B3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US46030A
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US66258A
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US483030A
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US1630201A
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US710607A
Cited
FR381148A
Cited
US1234498A
Cited
US1556372A
Cited
US1634238A
Cited
US1675612A
Cited
US2287288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |