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US2665818A
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Expansion closure plug
Assignee: WROUGHT WASHER Manufacturing Co
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Filing: 1951-09-20
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Granted: 1954-01-12
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Expires: 1971-09-20
Abstract
No abstract record available.
Inventors
- 👤 Walter F Borges
- 👤 Vernon W Goss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:39
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/005; F16; F16L; F16L55/00; F16L55/10; F16L55/12; F16L55/128; F16L55/13; Y; Y10; Y10S; Y10S29/00; Y10S29/034; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49938
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1306641A
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US793307A
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US808567A
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US1058210A
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US1730377A
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US1837345A
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US1974150A
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US2265951A
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GB626415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |