US2935801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock excavating machine
Assignee: Individual
•
Filing: 1956-06-21
•
Granted: 1960-05-10
•
Expires: 1976-06-21
Abstract
No abstract record available.
Inventors
- 👤 Ii Selden L Stewart
- 👤 Waldin Mathew Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:31
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/08; E02F3/087; E02F3/12; E02F3/14; E02F3/147
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE159867C
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USRE16997E
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US1131071A
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GB103025A
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US1703320A
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US1769074A
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US1764949A
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GB428327A
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US2339128A
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FR977583A
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US2686981A
Cited
GB685330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |