US2496694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mining machine protective cover unit
Assignee: Individual
•
Filing: 1946-03-08
•
Granted: 1950-02-07
•
Expires: 1966-03-08
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:14
CPC Classifications
E; E21; E21D; E21D23/00; E21D23/0004; E21D23/0034; E21D23/0039
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US753092A
Cited
US1290020A
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US1450329A
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US1871186A
Cited
DE512214C
Cited
US1765248A
Cited
US2031421A
Cited
GB511557A
Cited
US2320653A
Cited
US2339523A
Cited
US2408967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |