US3450447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifriction bearing assembly
Assignee: FRANCIS E HACKER
•
Filing: 1967-03-01
•
Granted: 1969-06-17
•
Expires: 1987-03-01
Abstract
No abstract record available.
Inventors
- 👤 Francis E Hacker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:19
CPC Classifications
F; F16; F16C; F16C29/00; F16C29/04; Y; Y10; Y10T; Y10T409/00; Y10T409/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1898273A
Cited
US2063741A
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US2303299A
Cited
US2520453A
Cited
US2518102A
Cited
GB860166A
Cited
US3245512A
Cited
US3353875A
Cited
US3244392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |