US3401991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-lubricating side bearings
Assignee: Unity Railway Supply Co Inc
•
Filing: 1967-10-18
•
Granted: 1968-09-17
•
Expires: 1987-10-18
Abstract
No abstract record available.
Inventors
- 👤 Robert W Macdonnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:23
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/14; B61F5/146; F; F16; F16C; F16C25/00; F16C25/02; F16C25/04; F16C2326/00; F16C2326/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1179755A
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US1290319A
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US1777578A
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US1853886A
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US1914479A
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US1808839A
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US2541769A
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US2680259A
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US2675276A
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US3054645A
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US3243236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |