Patent US2617334A successfully refreshed from Google Patents.
US2617334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulper for paper stock
Assignee: VALLEY IRON WORKS Co
•
Filing: 1947-04-19
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Granted: 1952-11-11
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Expires: 1967-04-19
Abstract
No abstract record available.
Inventors
- 👤 William K Kolb
- 👤 Pollock Samuel Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:07
CPC Classifications
D; D21; D21D; D21D1/00; D21D1/20; D21D1/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US492239A
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US610122A
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FR517728A
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US1691308A
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AU1266628A
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US1778860A
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US1886020A
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GB403913A
Cited
US2129789A
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US2289612A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |