Patent US4135429A successfully refreshed from Google Patents.
US4135429A
Expired / Lapsed
US
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Piano bass string
Assignee: Individual
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Filing: 1976-06-18
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Granted: 1979-01-23
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Expires: 1996-06-18
Abstract
Abstract A piano bass string includes a load carrying wire and at least one wire encircling the load carrying wire with the encircling wire made up of a tubular casing of a drawable material and a core which is heavier than the drawable material.
Inventors
- 👤 Klaus-Peter Heyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:33
CPC Classifications
G; G10; G10D; G10D3/00; G10D3/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
A piano bass string comprising a load carry wire and at least one layer of encircling wire wrapped around said load carrying wire, wherein the encircling wire comprises a tubular casing formed from a drawable material, said casing being made of copper, and drawn over a core of material which is heavier than the drawable material, said core being made of lead.
Claim 2
Dependent Claim
62 words
A piano bass string comprising a load carry wire and at least one layer of encircling wire wrapped around said load carrying wire, wherein the encircling wire comprises a tubular casing formed from a drawable material, said casing being made of copper, and drawn over a core of material which is heavier than the drawable material, said core being made of lead.
Claim 3
Dependent Claim
58 words
A piano bass string as defined in claim 1, characterized in that the ratio of the fraction of the casing to the core is dependent upon the desired vibration frequency for the bass string, wherein for relatively higher frequencies, the proportionate fraction of the casing increases while for relatively lower frequencies the proportional fraction of the core increases.
Claim 4
Dependent Claim
33 words
A piano bass string as defined in claim 1, wherein the individual coils of the encircling wire around the load carrying wire are spaced a small and substantially constant distance from each other.
Claim 5
Dependent Claim
20 words
A piano bass string as defined in claim 1, and including a thin plastic outer coating around said encircling wire.
References Cited (Backward Citations)
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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) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |