US4686990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery test circuit for a heart pacemaker
Assignee: Pacesetter AB
•
Filing: 1986-09-17
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Granted: 1987-08-18
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Expires: 2006-09-17
Abstract
Abstract A battery test circuit for a heart pacemaker generates a signal which corresponds to the charge status of the pacemaker battery which is displayable in a manner which does not interfere with the normal pacing frequency of the pacemaker. A marking pulse is generated by the circuit at a chronological position between successive stimulation pulses which is dependent upon the charge status of the battery at the time the marking pulse is generated.
Inventors
- 👤 Lennart Moberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:28
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/37; A61N1/3706; A61N1/3708
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
75 words
A battery test circuit for a heart pacemaker which generates a plurality of successive stimulation pulses comprising: means for generating an electrical signal corresponding to the charge status of the battery; means for generating at least one marking pulse; and means for mixing said marking pulse with said stimulation pulses with the marking pulse disposed at a chronological position with respect to at least one of said stimulation pulses which corresponds to said charge status.
Claim 2
Dependent Claim
75 words
A battery test circuit for a heart pacemaker which generates a plurality of successive stimulation pulses comprising: means for generating an electrical signal corresponding to the charge status of the battery; means for generating at least one marking pulse; and means for mixing said marking pulse with said stimulation pulses with the marking pulse disposed at a chronological position with respect to at least one of said stimulation pulses which corresponds to said charge status.
Claim 3
Dependent Claim
44 words
A battery test circuit as claimed in claim 1, wherein said means for mixing mixes said marking pulse with said stimulation pulses with said marking pulse disposed at a selected distance between two successive stimulation pulses, said selected distance corresponding to said charge status.
Claim 4
Dependent Claim
89 words
A battery test circuit as claimed in claim 1, wherein said means for generating at least one marking pulse generates said marking pulse after each n th stimulation pulse, wherein n is a whole number, and wherein said means for mixing mixes said marking pulse with said stimulation pulses with said marking pulse disposed at a chronological position with respect to said n th stimulation pulse corresponding to a remaining fraction of said charge status, such that n plus said remaining fraction is equal to the remaining battery capacity.
Claim 5
Dependent Claim
15 words
A battery test circuit as claimed in claim 3, wherein n is measured in years.
References Cited (Backward Citations)
US3599627A
Cited
US3618615A
Cited
US3841336A
Cited
US4102346A
Cited
US4276883A
Cited
US4445512A
Cited
US4231027A
Cited
US4527567A
Cited
US4556061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |