US2908799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for electric arc erosion
Assignee: BOC Group Ltd
•
Filing: 1958-01-20
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Granted: 1959-10-13
•
Expires: 1978-01-20
Abstract
No abstract record available.
Inventors
- 👤 Cresswell Robert Arthur
- 👤 Bradshaw James Ronald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:17
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB143331A
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US1436557A
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US2381355A
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US2702846A
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US2620422A
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GB731953A
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US2796509A
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US2821615A
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US2806124A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |