Patent US2975899A successfully refreshed from Google Patents.
US2975899A
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Screening device
Assignee: Bird Machine Co Inc
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Filing: 1957-04-16
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Granted: 1961-03-21
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Expires: 1977-04-16
Abstract
No abstract record available.
Inventors
- 👤 Madison M Cannon
- 👤 George M Dick
- 👤 Salomon M Salomon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:37
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/12; B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/17; B01D29/23; B01D29/25; B01D29/50; B01D29/52; B01D29/54; B01D29/76; B01D29/86; B01D29/88; B01D29/90; B01D29/908; 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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |