Patent US3673319A successfully refreshed from Google Patents.
Patent US1474500A successfully refreshed from Google Patents.
US1474500A
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US
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Method of manufacturing gear wheels
Assignee: SKF AB
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Filing: 1920-10-22
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Granted: 1923-11-20
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Expires: 1940-10-22
Abstract
No abstract record available.
Inventors
- 👤 Wingqvist Erik Hjalmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:42
CPC Classifications
B; B23; B23F; B23F1/00; B23F1/06; Y; Y10; Y10S; Y10S451/00; Y10S451/90; Y10T; Y10T409/00; Y10T409/10; Y10T409/101431; Y10T409/105883; Y10T409/106201; Y10T74/00; Y10T74/19; Y10T74/19949; Y10T74/19963; Y10T74/19972; Y10T74/19986
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) | 1926-11-19 | 1927-05-21 | 1927-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-11-19 | 1931-05-21 | 1931-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-11-19 | 1935-05-21 | 1935-11-20 | $7700.00 | Window Closed / Lapsed |