US2797430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner construction and closure therefor
Assignee: CLEMENTS Manufacturing CO
•
Filing: 1955-02-08
•
Granted: 1957-07-02
•
Expires: 1975-02-08
Abstract
No abstract record available.
Inventors
- 👤 Everett D Thornwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:53
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/24; A47L9/242; A47L5/00; A47L5/12; A47L5/22; A47L5/28; A47L5/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2257555A
Cited
US2355183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |