Patent US2837212A successfully refreshed from Google Patents.
Patent US3030159A successfully refreshed from Google Patents.
US3030159A
Expired / Lapsed
US
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Cylinder construction
Assignee: Individual
•
Filing: 1958-11-17
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Granted: 1962-04-17
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Expires: 1978-11-17
Abstract
No abstract record available.
Inventors
- 👤 George E Barnhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:48
CPC Classifications
F; F16; F16J; F16J10/00; F16J10/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2712952A
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Cited
US2749162A
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Cited
US2862467A
Cited
US2865693A
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US2960359A
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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) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |