US3268673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic pushbutton assembly
Assignee: TDK Micronas GmbH
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Filing: 1963-05-09
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Granted: 1966-08-23
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Expires: 1983-05-09
Abstract
No abstract record available.
Inventors
- 👤 Bilek Frank Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:54
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/72; H01H13/74; H01H3/00; H01H3/22; H01H3/24; H04; H04M; H04M1/00; H04M1/02; H04M1/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
AN ELECTRICAL CONTROL DEVICE COMPRISING A MULTI-LINE TELEPHONE SET, MEANS INCLUDING AN ASSEMBLY OF PUSHBUTTONS FOR SELECTIVELY CONNECTING SAID TELEPHONE TO ANY ONE OF SAID TELEPHONE LINES, SAID PUSHBUTTON ASSEMBLY MEANS COMPRISING A RESERVOIR HOLDING A NON-COMPRESSIBLE HYDRAULIC FLUID, A PLURALITY OF COMMUNICATING HYDRAULIC CYLINDERS ALSO FILLED WITH SAID FLUID, PUSHBUTTON ACTUATED PISTON MEANS FOR SELECTIVELY DISPLACING THE FLUID IN ANY ONE OF SAID CYLINDERS INTO SAID RESERVOIR AND OTHER OF SAID CYLINDERS, MEANS RESPONSIVE TO SAID DISPLACEMENT OF SAID FLUID
Claim 2
Dependent Claim
81 words
AN ELECTRICAL CONTROL DEVICE COMPRISING A MULTI-LINE TELEPHONE SET, MEANS INCLUDING AN ASSEMBLY OF PUSHBUTTONS FOR SELECTIVELY CONNECTING SAID TELEPHONE TO ANY ONE OF SAID TELEPHONE LINES, SAID PUSHBUTTON ASSEMBLY MEANS COMPRISING A RESERVOIR HOLDING A NON-COMPRESSIBLE HYDRAULIC FLUID, A PLURALITY OF COMMUNICATING HYDRAULIC CYLINDERS ALSO FILLED WITH SAID FLUID, PUSHBUTTON ACTUATED PISTON MEANS FOR SELECTIVELY DISPLACING THE FLUID IN ANY ONE OF SAID CYLINDERS INTO SAID RESERVOIR AND OTHER OF SAID CYLINDERS, MEANS RESPONSIVE TO SAID DISPLACEMENT OF SAID FLUID
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |