US2539912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode spacing regulator utilizing reference electrodes
Assignee: Allis Chalmers Corp
•
Filing: 1947-03-08
•
Granted: 1951-01-30
•
Expires: 1967-03-08
Abstract
No abstract record available.
Inventors
- 👤 Journeaux Didier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:32
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/144; H05B7/148; H05B7/152; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 0
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US2234239A
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US2246161A
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US2259958A
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US2325092A
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US2342657A
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US2399388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |