Patent US2826402A successfully refreshed from Google Patents.
US2826402A
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Remotely controlled mining system
Assignee: Union Carbide Corp
•
Filing: 1953-05-11
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Granted: 1958-03-11
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Expires: 1973-05-11
Abstract
No abstract record available.
Inventors
- 👤 Paul L Alspaugh
- 👤 John W Heimaster
- 👤 Roy L Mcneill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:31
CPC Classifications
E; E21; E21F; E21F13/00; E21F13/08; E21F13/083; E21C; E21C35/00; E21C35/24; E21C35/302; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/1914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1444775A
Cited
US1477571A
Cited
US1016980A
Cited
US1290594A
Cited
US1388545A
Cited
US1372318A
Cited
US1620531A
Cited
US1562872A
Cited
US1634801A
Cited
US1726963A
Cited
US1951089A
Cited
US1998294A
Cited
US2182477A
Cited
US2250141A
Cited
US2320196A
Cited
US2420009A
Cited
US2394194A
Cited
US2638996A
Cited
US2541496A
Cited
US2639101A
Cited
US2599042A
Cited
FR981860A
Cited
US2699328A
Cited
US2589220A
Cited
US2620386A
Cited
US2616677A
Cited
US2674364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |