US1975002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound deadener for walls, ceilings, etc.
Assignee: Individual
•
Filing: 1932-10-13
•
Granted: 1934-09-25
•
Expires: 1952-10-13
Abstract
No abstract record available.
Inventors
- 👤 Heerwagen Paul Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:44
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/8409; E04B2001/8263; E04B2001/8414; E04B2001/8423; E04B2001/8442
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) | 1937-09-24 | 1938-03-26 | 1938-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-09-24 | 1942-03-26 | 1942-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-09-24 | 1946-03-26 | 1946-09-25 | $7700.00 | Window Closed / Lapsed |