Patent US2755107A successfully refreshed from Google Patents.
US2755107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internally flush latch for vacuum cleaner pipes
Assignee: AIR WAY IND Inc
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Filing: 1952-12-18
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Granted: 1956-07-17
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Expires: 1972-12-18
Abstract
No abstract record available.
Inventors
- 👤 Dewey M Dow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:02
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/24; A47L9/242
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US278617A
Cited
US557423A
Cited
US873625A
Cited
US981705A
Cited
US939019A
Cited
US1403655A
Cited
US1790238A
Cited
US2582446A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |