Patent US2308917A successfully refreshed from Google Patents.
US2308917A
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Apparatus and method for controlling pulp density
Assignee: Hardinge Inc
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Filing: 1939-01-06
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Granted: 1943-01-19
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Expires: 1959-01-06
Abstract
No abstract record available.
Inventors
- 👤 Hardinge Harlowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:02
CPC Classifications
B; B02; B02C; B02C25/00; D; D21; D21B; D21B1/00; D21B1/04; D21B1/06; D21B1/063; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/0391; Y10T137/2496; Y10T137/2514; Y10T137/8593; Y10T137/87265
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) | 1946-01-18 | 1946-07-20 | 1947-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-01-18 | 1950-07-20 | 1951-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-01-18 | 1954-07-20 | 1955-01-19 | $7700.00 | Window Closed / Lapsed |