US2039008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a material for absorbing sound
Assignee: CF Burgess Laboratories Inc
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Filing: 1932-07-28
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Granted: 1936-04-28
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Expires: 1952-07-28
Abstract
No abstract record available.
Inventors
- 👤 Max H Kliefoth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:34
CPC Classifications
C; C04; C04B; C04B30/00; F; F01; F01N; F01N1/00; F01N1/24; F01N2310/00; F01N2310/06; F01N2310/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1939-04-28 | 1939-10-28 | 1940-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-28 | 1943-10-28 | 1944-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-28 | 1947-10-28 | 1948-04-28 | $7700.00 | Window Closed / Lapsed |