Patent US3468334A successfully refreshed from Google Patents.
US3468334A
Expired / Lapsed
US
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Outlet receptacle for centralized vacuum cleaning system
Assignee: Benjamin Electric Manufacturing Co
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Filing: 1967-08-09
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Granted: 1969-09-23
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Expires: 1987-08-09
Abstract
No abstract record available.
Inventors
- 👤 James C Hamrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:22
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/38; F; F16; F16L; F16L3/00; F16L3/01; Y; Y10; Y10S; Y10S138/00; Y10S138/08; Y10S55/00; Y10S55/08; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6918; Y10T137/6932; Y10T137/6943; Y10T137/6966; Y10T137/6969; Y10T137/698
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US980418A
Cited
US1810607A
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US2101311A
Cited
US2874980A
Cited
US2953806A
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US3291927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |