US2589638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper machinery
Assignee: Black Clawson Co
•
Filing: 1946-07-19
•
Granted: 1952-03-18
•
Expires: 1966-07-19
Abstract
No abstract record available.
Inventors
- 👤 Stephen A Staege
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:38
CPC Classifications
D; D21; D21F; D21F1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1774363A
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US1964291A
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US2205693A
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US2202890A
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US2249128A
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US2243773A
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US2339711A
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US2347850A
Cited
US2381286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |