Patent US3955701A successfully refreshed from Google Patents.
US3955701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universal extension for outlet boxes
Assignee: Individual
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Filing: 1975-04-21
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Granted: 1976-05-11
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Expires: 1995-04-21
Abstract
Abstract A universal extension ring for electrical outlet boxes is described. It is adapted to be mounted on the ordinary single or two-device outlet box to increase its volume and also to enable single or double switches or receptacles to be secured thereto. The extension ring features removable back panels to accomplish the above objectives.
Inventors
- 👤 Reinhold Fisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:45
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/08; H02G3/12; H02G3/121
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
149 words
An extension ring for extending electrical outlet boxes, comprising a generally rectangular-configured box having first and second opposed side walls and an open front face and a rear face, plural knockout plugs in its side walls, plural inwardly directed tabs having threaded openings located at the box front face at diagonally-located corners for mounting of a cover plate, lips extending inward from first opposed side walls in the plane of the rear face and having plural unthreaded openings, and spaced removable panels extending inward from second opposed side walls in the plane of the rear face, said box having openings at its corners at its rear face, said lips and panels defining a generally rectangular opening at the center of the rear face, said rear corner openings comprising angularly directed slots at diagonal corners where the panels and lips meet for mounting of the ring on the outlet box.
Claim 2
Dependent Claim
149 words
An extension ring for extending electrical outlet boxes, comprising a generally rectangular-configured box having first and second opposed side walls and an open front face and a rear face, plural knockout plugs in its side walls, plural inwardly directed tabs having threaded openings located at the box front face at diagonally-located corners for mounting of a cover plate, lips extending inward from first opposed side walls in the plane of the rear face and having plural unthreaded openings, and spaced removable panels extending inward from second opposed side walls in the plane of the rear face, said box having openings at its corners at its rear face, said lips and panels defining a generally rectangular opening at the center of the rear face, said rear corner openings comprising angularly directed slots at diagonal corners where the panels and lips meet for mounting of the ring on the outlet box.
Claim 3
Dependent Claim
31 words
An extension ring as claimed in claim 1 wherein each lip has three spaced slotted openings aligned in a row in each lip and with the openings in the other lip.
Claim 4
Dependent Claim
28 words
An extension ring as claimed in claim 2 wherein the ring is about 4 inches square with the center opening in the rear face approximately 2 inches wide.
Claim 5
Dependent Claim
19 words
An extension ring as claimed in claim 1 wherein the panels have scorings where they can be broken out.
Claim 6
Dependent Claim
26 words
An extension ring as claimed in claim 1 wherein the corner tabs are located at diagonal corners different from the corners where the slots are located.
Claim 7
Dependent Claim
25 words
An extension ring as claimed in claim 1 wherein the depth of the extension ring is approximately the same as that of the outlet box.
References Cited (Backward Citations)
US1952719A
Cited
US1991160A
Cited
US2378861A
Cited
US2622756A
Cited
US2989206A
Cited
US3288910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |