US2979755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Central vacuum system for homes
Assignee: Individual
•
Filing: 1956-09-07
•
Granted: 1961-04-18
•
Expires: 1976-09-07
Abstract
No abstract record available.
Inventors
- 👤 Louie M Mccaskill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:42
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/38; Y; Y10; Y10S; Y10S55/00; Y10S55/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2641780A
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US2725113A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |