Patent US3399772A successfully refreshed from Google Patents.
US3399772A
Expired / Lapsed
US
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Duplex pulp screen
Assignee: Beloit Corp
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Filing: 1966-02-14
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Granted: 1968-09-03
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Expires: 1986-02-14
Abstract
No abstract record available.
Inventors
- 👤 Salomon M Salomon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:19
CPC Classifications
B; B01; B01D; B01D36/00; B01D36/04; B01D36/045; B01D29/00; B01D29/11; B01D29/114; B01D29/115; B01D29/117; B01D29/118; B01D29/50; B01D29/52; B01D29/54; B01D29/76; B01D29/86; B01D29/88; B01D29/92; D; D21; D21D; D21D5/00; D21D5/02; D21D5/06; B01D2201/00; B01D2201/28; B01D2201/287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |