Patent US3450185A successfully refreshed from Google Patents.
US3450185A
Expired / Lapsed
US
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Acoustical operable panel arrangement with removable panel covers
Assignee: Hough Manufacturing Corp
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Filing: 1967-02-10
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Granted: 1969-06-17
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Expires: 1987-02-10
Abstract
No abstract record available.
Inventors
- 👤 Don C Holloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:14
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/48; E06B3/481; E06B7/00; E06B7/16; E06B7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1171138A
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US3073381A
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US3241197A
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US3195192A
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US3277952A
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US3253552A
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US3309816A
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US3300899A
Cited
US3295257A
Cited
US3295588A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |