Patent US4199471A successfully refreshed from Google Patents.
US2113128A
Expired / Lapsed
US
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Sound insulation
Assignee: Woodall Industries Inc
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Filing: 1935-10-25
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Granted: 1938-04-05
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Expires: 1955-10-25
Abstract
No abstract record available.
Inventors
- 👤 George R Cunnington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:14
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/8409; E04B2001/8245; E04B2001/8414; E04B2001/8457; E04B2001/8461; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1039; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24446; Y10T428/24455; Y10T428/24463; Y10T428/24479; Y10T428/24595; Y10T428/24603; Y10T428/24612; Y10T428/24628; Y10T428/24942; Y10T428/24992
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) | 1941-04-04 | 1941-10-04 | 1942-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-04-04 | 1945-10-04 | 1946-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-04-04 | 1949-10-04 | 1950-04-05 | $7700.00 | Window Closed / Lapsed |