Patent US2631905A successfully refreshed from Google Patents.
US2631905A
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US
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Bearing surface
Assignee: NL Industries Inc
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Filing: 1947-07-25
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Granted: 1953-03-17
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Expires: 1967-07-25
Abstract
No abstract record available.
Inventors
- 👤 Coppen John James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:42
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/10; F16C33/1025; F16C33/106; F16C33/1075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US214662A
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US1236511A
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FR650137A
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GB295405A
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DE541306C
Cited
US1746020A
Cited
FR38226E
Cited
GB380660A
Cited
US1940301A
Cited
FR738343A
Cited
US2004254A
Cited
GB568724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |