Patent US2667371A successfully refreshed from Google Patents.
US2667371A
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US
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Coupling for conduit parts
Assignee: PULLMAN VACUUM CLEANER Corp
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Filing: 1950-06-13
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Granted: 1954-01-26
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Expires: 1970-06-13
Abstract
No abstract record available.
Inventors
- 👤 Paul C Holte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:57
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/22; F16L37/23; A; A47; A47L; A47L9/00; A47L9/24; A47L9/242; Y; Y10; Y10S; Y10S55/00; Y10S55/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US921691A
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US1830480A
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US2062628A
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US2159242A
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US2429202A
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US2413730A
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US2473973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |