Patent US1333394A successfully refreshed from Google Patents.
US1333394A
Expired / Lapsed
US
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Dipper-tooth
Assignee: STEEL Co
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Filing: 1919-10-06
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Granted: 1920-03-09
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Expires: 1939-10-06
Abstract
No abstract record available.
Inventors
- 👤 Ekman Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:33
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/28; E02F9/2808; E02F9/2858
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) | 1923-03-09 | 1923-09-08 | 1924-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-03-09 | 1927-09-08 | 1928-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-03-09 | 1931-09-08 | 1932-03-09 | $7700.00 | Window Closed / Lapsed |