US1671208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preformed acoustic unit
Assignee: Individual
•
Filing: 1926-11-30
•
Granted: 1928-05-29
•
Expires: 1946-11-30
Abstract
No abstract record available.
Inventors
- 👤 Maurice C Rosenblatt
- 👤 Stanley H Rosenblatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:59
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04B2001/8263; E04B2001/8281; E04B2001/8457; E04B2001/8461
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) | 1931-05-29 | 1931-11-28 | 1932-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-05-29 | 1935-11-28 | 1936-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-05-29 | 1939-11-28 | 1940-05-29 | $7700.00 | Window Closed / Lapsed |