Patent US3325799A successfully refreshed from Google Patents.
US3325799A
Expired / Lapsed
US
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Mattress alarm
Assignee: EDWIA GREINES COHEN
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Filing: 1964-07-13
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Granted: 1967-06-13
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Expires: 1984-07-13
Abstract
No abstract record available.
Inventors
- 👤 Robert L Farris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:56
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/68; A61B5/6887; A61B5/6892; A61B5/103; A61B5/11; A61B5/113; A61B2562/00; A61B2562/02; A61B2562/0261
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN AN ALARM INCLUDING A MATTRESS, A STRAP EXTERIORLY ENCOMPASSING SAID MATTRESS AND HAVING OPPOSITE ENDS TERMINATING AT A SIDE OF SAID MATTRESS, AN ELECTRICAL RESISTANCE TYPE STRAIN GAUGE HAVING ITS OPERATIVE OPPOSITE ENDS RESPECTIVELY ATTACHED TO SAID OPPOSITE ENDS OF SAID STRAP, MEANS PROVIDING AN ELECTRICAL POTENTIAL ACROSS THE RESISTIVE COMPONENT OF SAID STRAIN GAUGE, ELECTRICAL PULSING MEANS FOR PRODUCING A PULSE FOR SUBSTANTIALLY EACH CHANGE IN ELECTRICAL CURRENT FLOWING THROUGH SAID RESISTIVE COMPONENT OF SAID STRAIN GAUGE, AND ALARM MEANS CONNECTED TO SAID PULSING MEANS AND RESPONSIVE TO THE PROLONGED ABSENCE OF ELECTRICAL PULSES OF SAID PULSING MEANS.
Claim 2
Dependent Claim
100 words
IN AN ALARM INCLUDING A MATTRESS, A STRAP EXTERIORLY ENCOMPASSING SAID MATTRESS AND HAVING OPPOSITE ENDS TERMINATING AT A SIDE OF SAID MATTRESS, AN ELECTRICAL RESISTANCE TYPE STRAIN GAUGE HAVING ITS OPERATIVE OPPOSITE ENDS RESPECTIVELY ATTACHED TO SAID OPPOSITE ENDS OF SAID STRAP, MEANS PROVIDING AN ELECTRICAL POTENTIAL ACROSS THE RESISTIVE COMPONENT OF SAID STRAIN GAUGE, ELECTRICAL PULSING MEANS FOR PRODUCING A PULSE FOR SUBSTANTIALLY EACH CHANGE IN ELECTRICAL CURRENT FLOWING THROUGH SAID RESISTIVE COMPONENT OF SAID STRAIN GAUGE, AND ALARM MEANS CONNECTED TO SAID PULSING MEANS AND RESPONSIVE TO THE PROLONGED ABSENCE OF ELECTRICAL PULSES OF SAID PULSING MEANS.
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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) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |