Patent US3988606A successfully refreshed from Google Patents.
US1973994A
Expired / Lapsed
US
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Antifriction bearing
Assignee: SHAFER BEARING Corp
•
Filing: 1932-12-21
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Granted: 1934-09-18
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Expires: 1952-12-21
Abstract
No abstract record available.
Inventors
- 👤 Victor W Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:42
CPC Classifications
F; F16; F16C; F16C23/00; F16C23/06; F16C23/08; F16C23/082; F16C23/086; F16C19/00; F16C19/22; F16C19/24; F16C19/26; F16C33/00; F16C33/30; F16C33/34; F16C33/36
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) | 1937-09-17 | 1938-03-19 | 1938-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-09-17 | 1942-03-19 | 1942-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-09-17 | 1946-03-19 | 1946-09-18 | $7700.00 | Window Closed / Lapsed |