Patent US2675808A successfully refreshed from Google Patents.
US2675808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hecht
Assignee: —
•
Filing: —
•
Granted: 1954-04-20
•
Expires: 1971-04-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:33
CPC Classifications
A; A01; A01F; A01F11/00; A01F11/06; B; B02; B02B; B02B3/00; B02B3/04; Y; Y10; Y10S; Y10S56/00; Y10S56/01; Y10S56/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US770639A
Cited
US144590A
Cited
US224588A
Cited
US484808A
Cited
US584889A
Cited
US4388A
Cited
US707013A
Cited
US718462A
Cited
US1226718A
Cited
US1898757A
Cited
US2100137A
Cited
US2217945A
Cited
GB629943A
Cited
US2431016A
Cited
US2443031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |