US2289248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating concrete
Assignee: Kalman Floor Co Inc
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Filing: 1940-06-05
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Granted: 1942-07-07
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Expires: 1960-06-05
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:25
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/22; E01C19/30; E01C19/34; E01C19/38; E04; E04F; E04F15/00; E04F15/12; E04F21/00; E04F21/20; E04F21/24; E04F21/241; E04F21/242; E04F21/244; E04F21/245; E04F21/248
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) | 1945-07-06 | 1946-01-05 | 1946-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-06 | 1950-01-05 | 1950-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-06 | 1954-01-05 | 1954-07-07 | $7700.00 | Window Closed / Lapsed |