US1298486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of and means for grinding the curved superficies of conical rollers.
Assignee: SKF AB
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Filing: 1916-08-12
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Granted: 1919-03-25
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Expires: 1936-08-12
Abstract
No abstract record available.
Inventors
- 👤 Bengt Wikto Fjellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:56
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/10; B24B7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1922-03-24 | 1922-09-23 | 1923-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1926-03-24 | 1926-09-23 | 1927-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1930-03-24 | 1930-09-23 | 1931-03-25 | $7700.00 | Window Closed / Lapsed |