Patent US3281490A successfully refreshed from Google Patents.
Patent US2810529A successfully refreshed from Google Patents.
US2810529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hammermill rotor including paired
Assignee: —
•
Filing: —
•
Granted: 1957-10-22
•
Expires: 1974-10-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:14
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/02; B02C13/04; B02C13/26; B02C13/28; B02C13/2804; B02C2013/2808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1375862A
Cited
US1413652A
Cited
US1413611A
Cited
US1821912A
Cited
US2200374A
Cited
US2237510A
Cited
CH271569A
Cited
US2602597A
Cited
US2714995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |