Patent US3458892A successfully refreshed from Google Patents.
US3458892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric cleaner
Assignee: Panasonic Holdings Corp
•
Filing: 1967-11-20
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Granted: 1969-08-05
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Expires: 1987-11-20
Abstract
No abstract record available.
Inventors
- 👤 Tsuneo Kobayashi
- 👤 Kenzo Tatematsu
- 👤 Koichi Yoshimura
- 👤 Yoshio Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:58
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/28; A47L9/2894; A47L9/2836; A47L9/2842; A47L9/2889
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2958894A
Cited
US3382374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |