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US2981360A
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US
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Sound-absorbing systems
Assignee: Bayer AG
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Filing: 1955-02-17
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Granted: 1961-04-25
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Expires: 1975-02-17
Abstract
No abstract record available.
Inventors
- 👤 Fritze Ulrich
- 👤 Muller Rudolf
- 👤 Paffrath Hans-Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:20
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/168
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB412923A
Cited
US2081952A
Cited
GB482809A
Cited
GB510707A
Cited
US2268160A
Cited
GB589490A
Cited
US2694233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |