Patent US2031098A successfully refreshed from Google Patents.
US2031098A
Expired / Lapsed
US
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Device for protecting concrete
Assignee: Individual
•
Filing: 1933-12-11
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Granted: 1936-02-18
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Expires: 1953-12-11
Abstract
No abstract record available.
Inventors
- 👤 Sam P Cerf
- 👤 Ervin W Cerf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:13
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/24; B28B11/245; E; E01; E01C; E01C23/00; E01C23/03; Y; Y10; Y10S; Y10S264/00; Y10S264/43; Y10S52/00; Y10S52/07; Y10T; Y10T428/00; Y10T428/16; Y10T428/19; Y10T428/192; Y10T428/24; Y10T428/24033; Y10T428/24041; Y10T428/2405; Y10T428/2419; Y10T428/24215; Y10T428/24231; Y10T428/24264
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) | 1939-02-17 | 1939-08-19 | 1940-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-02-17 | 1943-08-19 | 1944-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-02-17 | 1947-08-19 | 1948-02-18 | $7700.00 | Window Closed / Lapsed |