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Patent US3483947A successfully refreshed from Google Patents.
US3483947A
Expired / Lapsed
US
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Sound-absorbing panel
Assignee: United States Steel Corp
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Filing: 1967-09-08
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Granted: 1969-12-16
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Expires: 1987-09-08
Abstract
No abstract record available.
Inventors
- 👤 James E Sulewsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:05
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04B2001/8423; E04B2001/8428; E04B2001/8452
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1867449A
Cited
CA547266A
Cited
US1807395A
Cited
US2085436A
Cited
GB614404A
Cited
FR58065E
Cited
GB851675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |