US3515910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic absorbing material
Assignee: United States Department of the Navy
•
Filing: 1968-11-12
•
Granted: 1970-06-02
•
Expires: 1988-11-12
Abstract
No abstract record available.
Inventors
- 👤 Richard D Fritz
- 👤 Harper J Whitehouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:32
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3365590A
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US2946904A
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US2881336A
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US2972068A
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US3179823A
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US3400340A
Cited
US3427481A
Cited
US3376438A
Cited
US3378705A
Cited
US3403271A
Cited
US3378814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |