Patent US2938647A successfully refreshed from Google Patents.
US2938647A
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Closure for pressurized vessels
Assignee: Cornelius Co
•
Filing: 1955-11-23
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Granted: 1960-05-31
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Expires: 1975-11-23
Abstract
No abstract record available.
Inventors
- 👤 Richard T Cornelius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:22
CPC Classifications
F; F16; F16J; F16J13/00; F16J13/02; Y; Y10; Y10T; Y10T292/00; Y10T292/20; Y10T292/205; Y10T292/212
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US232925A
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FR340134A
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US1502673A
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US1949303A
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GB485051A
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US2277824A
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US2548934A
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GB646007A
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GB692315A
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US2638242A
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US2705581A
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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) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |