US4024535B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
US4024535B1 - - Google Patents
Assignee: Acoustical Design Inc
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Filing: 1976-06-28
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Granted: 1990-10-02
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Expires: 1996-06-28
Abstract
No abstract record available.
Inventors
- 👤 Goldstein Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:12
CPC Classifications
H; H04; H04R; H04R3/00; G; G10; G10K; G10K11/00; G10K11/16; G10K11/175; G10K11/1752; H04K; H04K3/00; H04K3/40; H04K3/42; H04K3/43; H04K3/80; H04K3/82; H04K3/825; H04K2203/00; H04K2203/10; H04K2203/12
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) | 1993-10-01 | 1994-04-02 | 1994-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-01 | 1998-04-02 | 1998-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-01 | 2002-04-02 | 2002-10-02 | $7700.00 | Window Closed / Lapsed |