US2875110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion resistant treatment for hollow drill rods
Assignee: SANDVIKENS JERWERKS AB
•
Filing: 1954-06-24
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Granted: 1959-02-24
•
Expires: 1974-06-24
Abstract
No abstract record available.
Inventors
- 👤 Rossander Bror Ludvig Eugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:28
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US973407A
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US1697086A
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US2181361A
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US2312855A
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US2310239A
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US2418935A
Cited
US2448397A
Cited
US2476345A
Cited
GB680801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |