US2540301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Papermaking machine and control therefor
Assignee: Black Clawson Co
•
Filing: 1945-07-30
•
Granted: 1951-02-06
•
Expires: 1965-07-30
Abstract
No abstract record available.
Inventors
- 👤 Stephen A Staege
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:01
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/06; G; G05; G05D; G05D9/00; G05D9/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7306; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/8593; Y10T137/85954
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1590607A
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US2032016A
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US1961893A
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US2001208A
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US2051180A
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GB435441A
Cited
US2110313A
Cited
US2354945A
Cited
US2354964A
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US2347717A
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US2318066A
Cited
US2394220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |