Patent US2518218A successfully refreshed from Google Patents.
US2518218A
Expired / Lapsed
US
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Coupling for vacuum systems
Assignee: Individual
•
Filing: 1947-05-07
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Granted: 1950-08-08
•
Expires: 1967-05-07
Abstract
No abstract record available.
Inventors
- 👤 Henry F Benoit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:00
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/24; A47L9/242; Y; Y10; Y10T; Y10T24/00; Y10T24/13; Y10T24/1321; Y10T24/1324; Y10T24/1353
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1272714A
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US1368985A
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US1861403A
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US1969203A
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US1913198A
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US2019540A
Cited
US2052448A
Cited
US2138946A
Cited
US2252299A
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US2360159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |