Patent US2262704A successfully refreshed from Google Patents.
US2262704A
Expired / Lapsed
US
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Apparatus used in connection with laying, drying, and curing concrete
Assignee: Individual
•
Filing: 1938-09-30
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Granted: 1941-11-11
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Expires: 1958-09-30
Abstract
No abstract record available.
Inventors
- 👤 Francis M Tompkins
- 👤 William T Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:34
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/03; Y; Y10; Y10S; Y10S425/00; Y10S425/11; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426
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) | 1944-11-10 | 1945-05-12 | 1945-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-11-10 | 1949-05-12 | 1949-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-11-10 | 1953-05-12 | 1953-11-11 | $7700.00 | Window Closed / Lapsed |