Patent US2863525A successfully refreshed from Google Patents.
US2863525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner
Assignee: Individual
•
Filing: 1956-06-01
•
Granted: 1958-12-09
•
Expires: 1976-06-01
Abstract
No abstract record available.
Inventors
- 👤 Arsene N Lucian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:12
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/16; A47L5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US470403A
Cited
US764419A
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US1083408A
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US975396A
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US997548A
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US1078512A
Cited
US1745950A
Cited
GB549627A
Cited
US2539257A
Cited
DE823781C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |