US2449943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making antifriction bearings
Assignee: Bower Roller Bearing Co
•
Filing: 1945-04-25
•
Granted: 1948-09-21
•
Expires: 1965-04-25
Abstract
No abstract record available.
Inventors
- 👤 Glen F Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:29
CPC Classifications
B; B21; B21K; B21K25/00; F; F16; F16C; F16C19/00; F16C19/22; F16C19/24; F16C19/26; F16C33/00; F16C33/30; F16C33/58; F16C33/60; F16C33/605; F16C43/00; F16C43/04; F16C2240/00; F16C2240/40; F16C2240/70; F16C2240/80; F16C2240/82; F16C2240/84; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49679; Y10T29/49682; Y10T29/49684
Claims Analysis
Total Claims: 0
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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) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |