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US2692618A
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Diaphragmed piston and cylinder construction
Assignee: Individual
•
Filing: 1951-09-19
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Granted: 1954-10-26
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Expires: 1971-09-19
Abstract
No abstract record available.
Inventors
- 👤 Ludowici Johann Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:10
CPC Classifications
F; F16; F16J; F16J3/00; F16J3/06; B; B66; B66F; B66F3/00; B66F3/24; B66F3/247
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE14235C
Cited
US335033A
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US491794A
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US1085818A
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US1169625A
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US1414835A
Cited
US1754989A
Cited
FR634077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |