Patent US2989252A successfully refreshed from Google Patents.
US2989252A
Expired / Lapsed
US
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Apparatus for processing fibrous material
Assignee: —
•
Filing: —
•
Granted: 1961-06-20
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Expires: 1978-06-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:55
CPC Classifications
B; B02; B02C; B02C13/00; B02C18/00; B02C18/06; B02C18/14; B02C18/142; B02C18/144; B02C18/16; B02C18/18; B02C18/186; B02C18/22; B02C18/2216; B02C18/2225; B02C18/2291; B02C19/00; B02C19/0056; B02C23/00; B02C23/18; B02C23/24; E; E04; E04F; E04F21/00; E04F21/02; E04F21/06; E04F21/08; E04F21/085
Claims Analysis
Total Claims: 0
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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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |