Patent US2988211A successfully refreshed from Google Patents.
US2988211A
Expired / Lapsed
US
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Mandrel lubricating device
Assignee: Baldwin Lima Hamilton Corp
•
Filing: 1958-05-26
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Granted: 1961-06-13
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Expires: 1978-05-26
Abstract
No abstract record available.
Inventors
- 👤 Francis J Kent
- 👤 Hammon Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:17
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US294315A
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US439916A
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US1233553A
Cited
US1617952A
Cited
US2047237A
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US2075803A
Cited
US2538917A
Cited
US2847880A
Cited
GB790398A
Cited
US2900090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |