US3254480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter support for vacuum cleaners
Assignee: Signal Manufacturing Co
•
Filing: 1962-11-09
•
Granted: 1966-06-07
•
Expires: 1982-11-09
Abstract
No abstract record available.
Inventors
- 👤 Gerald E Rideout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:59
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/12; A47L9/127
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE245131C
Cited
US2335428A
Cited
US2329688A
Cited
US2875947A
Cited
GB798766A
Cited
US2966652A
Cited
US2962117A
Cited
US3031826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |