US3435909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound reflecting structure
Assignee: Wenger Corp
•
Filing: 1965-10-23
•
Granted: 1969-04-01
•
Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Jerry A Wenger
- 👤 Harvey M Urch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:45
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/8227; E04B1/8236; G; G10; G10K; G10K11/00; G10K11/18; G10K11/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1238228A
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US1282685A
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GB346792A
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US2143235A
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US2406729A
Cited
GB645759A
Cited
US2963122A
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US2978754A
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US3180446A
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US3232370A
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US3316999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |