US3383822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grating
Assignee: EMEH Inc
•
Filing: 1965-12-17
•
Granted: 1968-05-21
•
Expires: 1985-12-17
Abstract
No abstract record available.
Inventors
- 👤 George A Vichmann
- 👤 Dennis A A Sedgley
- 👤 Browning Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:29
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/04; E03F5/06; E04; E04C; E04C2/00; E04C2/30; E04C2/42; E04C2/421; E04C2/422; E04C2/425; E04F; E04F15/00; E04F15/02; E04F15/02161; E04F15/02166; E04F19/00; E04F19/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB371147A
Cited
US1946035A
Cited
US2082197A
Cited
US2181812A
Cited
US2275105A
Cited
US2404570A
Cited
GB909988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |