Patent US3598619A successfully refreshed from Google Patents.
US3598619A
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US
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Glass ultrasonic delay line
Assignee: Panasonic Holdings Corp
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Filing: 1969-04-09
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Granted: 1971-08-10
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Expires: 1989-04-09
Abstract
Abstract AN ULTRASONIC DELAY LINE EMPLOYING GLASS AS A DELAY MEDIUM. SUBSTITUTION OF 0.5-7.0 MOLE PERCENT PBF2 FOR PART OF THE PBO IN A GLASS COMPOSITION CONSISTING ESSENTIALLY OF 68.0-77.0 MOLE PERCENT OF SIO2, 15-23 MOLE PERCENT OF PBO, 0.5-3.0 MOLE PERCENT OF AL2O3, 0.1-2.0 MOLE PERCENT OF AS2O3, AND 6.5-9.0 MOLE PERCENT OF K2O PRODUCES A GLASS COMPOSITION HAVING ACOUSTICALLY STABILIZED PROPERTIES THAT IS SUITABLE FOR A DELAY LINE MEDIUM. THE GLASS COMPOSITION HAS A HIGH MECHANICAL Q, LOW TEMPERATURE COEFFICIENT OF DELAY TIME, GOOD ACOUSTICAL STABILITY WITH RESPECT TO AGING, AND IS EASY TO PRODUCE.
Inventors
- 👤 Masanari Mikoda
- 👤 Tadashi Hikino
- 👤 Takayuki Kuroda
- 👤 Isao Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:25
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/11; C03C3/112; C03C3/102; C03C3/105; C03C4/00; C03C4/0057; H; H03; H03H; H03H9/00; H03H9/30; H03H9/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |