Patent US1976946A successfully refreshed from Google Patents.
US1976946A
Expired / Lapsed
US
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Acoustic tile
Assignee: CF Burgess Laboratories Inc
•
Filing: 1933-01-20
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Granted: 1934-10-16
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Expires: 1953-01-20
Abstract
No abstract record available.
Inventors
- 👤 Max H Klicfoth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:11
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; Y; Y10; Y10S; Y10S106/00; Y10S106/03; Y10S524/00; Y10S524/925
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) | 1937-10-15 | 1938-04-16 | 1938-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-10-15 | 1942-04-16 | 1942-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-10-15 | 1946-04-16 | 1946-10-16 | $7700.00 | Window Closed / Lapsed |