Patent US2886299A successfully refreshed from Google Patents.
US2886299A
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Bore mining apparatus having means to measure the angle between units thereof
Assignee: Union Carbide Corp
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Filing: 1956-04-30
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Granted: 1959-05-12
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Expires: 1976-04-30
Abstract
No abstract record available.
Inventors
- 👤 John W Heimaster
- 👤 Roy L Mcneill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:29
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/003; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32114; Y10T403/32196
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2214161A
Cited
US2213221A
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US2515251A
Cited
US2651513A
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GB706200A
Cited
US2761666A
Cited
US2780451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |