US4185167B1
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US4185167B1 - - Google Patents
Assignee: Acoustical Design Inc
•
Filing: 1978-08-11
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Granted: 1990-06-05
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Expires: 1998-08-11
Abstract
No abstract record available.
Inventors
- 👤 R Cunningham Donald
- 👤 E Sulewsky James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:07
CPC Classifications
H; H04; H04K; H04K3/00; H04K3/80; H04K3/82; H04K3/825; G; G10; G10K; G10K11/00; G10K11/16; G10K11/175; G10K11/1752; H04K3/40; H04K3/42; H04K3/43; H04K3/46; H04K2203/00; H04K2203/10; H04K2203/12; H04K2203/30; H04K2203/34; H04K3/60; H04K3/68
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) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |