US2674336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical panel
Assignee: C W LEMMERMAN Inc
•
Filing: 1950-10-06
•
Granted: 1954-04-06
•
Expires: 1970-10-06
Abstract
No abstract record available.
Inventors
- 👤 Carl W Lemmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:35
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/26; G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/168
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1229434A
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US2061903A
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US2138510A
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GB348928A
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US1952975A
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US2037884A
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US2089492A
Cited
US2161708A
Cited
GB498533A
Cited
US2308869A
Cited
US2519160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |