US3400820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screening apparatus with rotary pulsing member
Assignee: Bird Machine Co Inc
•
Filing: 1965-03-30
•
Granted: 1968-09-10
•
Expires: 1985-03-30
Abstract
No abstract record available.
Inventors
- 👤 George L Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:19
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/02; D21D5/06; B; B01; B01D; B01D29/00; B01D29/11; B01D29/117; B01D29/118; B01D29/76; B01D29/86; B01D29/88; B01D29/90; B01D29/908; B01D29/94; B01D29/945; B01D2201/00; B01D2201/02; B01D2201/28; B01D2201/287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |