US1978632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical construction
Assignee: Johns Manville Corp
•
Filing: 1932-01-25
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Granted: 1934-10-30
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Expires: 1952-01-25
Abstract
No abstract record available.
Inventors
- 👤 Louis R Hoff
- 👤 George D Kellogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:59
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/04; E04B9/045; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B9/001; E04B9/0464; E04B9/0478; E04B9/0485; E04B2001/8263; E04B2001/8281; E04B1/84; E04B2001/8457; E04B2001/8461; E04B2001/8476; E04B2001/848; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249923
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) | 1937-10-29 | 1938-04-30 | 1938-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-10-29 | 1942-04-30 | 1942-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-10-29 | 1946-04-30 | 1946-10-30 | $7700.00 | Window Closed / Lapsed |