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US2856205A
Expired / Lapsed
US
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Control coupling for vacuum cleaner air supply
Assignee: Individual
•
Filing: 1955-12-29
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Granted: 1958-10-14
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Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 John H Coleman
- 👤 Christopher E Anderson
- 👤 Presley W Tapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:58
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/16; A47L5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1078512A
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US1278020A
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US2124937A
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US2154773A
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US2164552A
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US2254363A
Cited
US2419720A
Cited
US2605043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |