US2804210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
shaughnessy
Assignee: —
•
Filing: —
•
Granted: 1957-08-27
•
Expires: 1974-08-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:17
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/14; E02; E02B; E02B8/00; E02B8/02; E02B8/023; E02B8/026; B; B01; B01D; B01D29/00; B01D29/44; B01D29/445; B01D33/00; B01D33/44; B01D33/48; B01D33/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |