Patent US2682811A successfully refreshed from Google Patents.
US2682811A
Expired / Lapsed
US
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Machine for screening paper stock
Assignee: COWLES CO
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Filing: 1952-09-23
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Granted: 1954-07-06
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Expires: 1972-09-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Infanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:00
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/22; B01D25/00; B01D25/32; B01D25/38; B01D29/00; B01D29/01; B01D29/62; B01D29/64; B01D29/6469; B01D29/6476; D; D21; D21D; D21D5/00; D21D5/02; D21D5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2424726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-05 | 1958-01-04 | 1958-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-05 | 1962-01-04 | 1962-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-05 | 1966-01-04 | 1966-07-06 | $7700.00 | Window Closed / Lapsed |