US2671923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction cleaner thread guard on converter port covers
Assignee: Hoover Co
•
Filing: 1949-11-29
•
Granted: 1954-03-16
•
Expires: 1969-11-29
Abstract
No abstract record available.
Inventors
- 👤 Briere Nelson W La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:49
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/28; A47L5/32; Y; Y10; Y10S; Y10S292/00; Y10S292/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1332235A
Cited
US2072690A
Cited
US2008476A
Cited
US2204912A
Cited
US2340347A
Cited
US2541061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |