US2742306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal assembly
Assignee: Vickers Inc
•
Filing: 1953-02-02
•
Granted: 1956-04-17
•
Expires: 1973-02-02
Abstract
No abstract record available.
Inventors
- 👤 James W Kelso
- 👤 Hamel Ivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:34
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1583291A
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US2017615A
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GB409600A
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US2185554A
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US2143249A
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US2258416A
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GB587248A
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US2483827A
Cited
US2500359A
Cited
US2535288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |