Patent US2942690A successfully refreshed from Google Patents.
US2942690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Central vacuum cleaning unit
Assignee: Individual
•
Filing: 1958-12-18
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Granted: 1960-06-28
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Expires: 1978-12-18
Abstract
No abstract record available.
Inventors
- 👤 Arvell A Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:01
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/16; A47L9/1658; A47L9/1666; A47L5/00; A47L5/12; A47L5/22; A47L5/38; A47L9/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1134294A
Cited
US2049603A
Cited
US2143144A
Cited
CH254781A
Cited
US2594456A
Cited
US2639780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |