US3475528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making custom ear molds for in-the-ear hearing aids
Assignee: Beltone Electronics Corp
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Filing: 1967-07-10
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Granted: 1969-10-28
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Expires: 1987-07-10
Abstract
No abstract record available.
Inventors
- 👤 Robert F Parks
- 👤 Alan G Deutschle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:54
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/38; B29C33/3842; B29C33/3857; B29C33/3878; B29C33/3885; H; H04; H04R; H04R25/00; H04R25/65; H04R25/652; H04R25/658; B29C2033/3871
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |