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US2780968A
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US
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Paper-making machines
Assignee: Beloit Iron Works Inc
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Filing: 1952-08-30
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Granted: 1957-02-12
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Expires: 1972-08-30
Abstract
No abstract record available.
Inventors
- 👤 Heys Ralph Chalinor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:02
CPC Classifications
D; D21; D21F; D21F3/00; D21F3/02; D21F3/0209; D21F3/0254; D21F1/00; D21F1/48; D21F1/50; D21F3/0272
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US209003A
Cited
US256047A
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US611421A
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US1197856A
Cited
US1701226A
Cited
GB381819A
Cited
US2174744A
Cited
US2535738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-12 | 1960-08-13 | 1961-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-12 | 1964-08-13 | 1965-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-12 | 1968-08-13 | 1969-02-12 | $7700.00 | Window Closed / Lapsed |