US3011584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound attenuating device
Assignee: Beazer East Inc
•
Filing: 1957-12-16
•
Granted: 1961-12-05
•
Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 Richard D Lemmerman
- 👤 James H Gildard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:02
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190820963A
Cited
US2519161A
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GB638954A
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US2557687A
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US2674335A
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US2685936A
Cited
US2720276A
Cited
US2713397A
Cited
FR1128475A
Cited
US2810449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |