String for stringed instruments and method of making same
Abstract
Abstract A STRING FOR STRINGED INSTRUMENTS HAVING EQUAL TORSION RIGIDITY IN BOTH DIRECTIONS OF ROTATION INCLUDES AN ELASTICALLY RESILIENT COARSE-PITCH TENSION BEARING ROPE-SHAPED CORE COMPOSED OF SYNTHETIC CONTINUOUS FILAMENTS OF PLASTIC MATERIAL ROPE CORE WHICH IS PROVIDES WITH AT LEAST ONE LESS PITCHED COVERING LAYER COMPOSED OF ROUND WIRES OR FLAT BANS. THE ROPE CONSISTS OF THREADS WITH A BREAKING ELONGATION IN THE RANGE OF 9 TO 15 PERCENT, A TENSILE STRENGTH IN THE RANGE OF 80 TO 110KG./MM.2, AND A MODULUS OF ELASTICITY IN THE RANGE OF 1150 TO 1350KG./MM.2. THE ROPE IS COVERED WITH EACH COVERING LAYER WHILE IT IS STRETCHED UNDER A TENSION CORRESPONDING TO AT LEAST ITS EXPECTED SUBSEQUENT TENSION ON THE INSTRUMENT.
Inventors
- 👤 Wigbert Behringer
Bibliographic Details
Claims Analysis
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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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |