Patent US2737032A successfully refreshed from Google Patents.
Patent US2046867A successfully refreshed from Google Patents.
US2046867A
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Method of and apparatus for treating concrete
Assignee: VACUUM CONCRETE Corp
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Filing: 1936-04-08
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Granted: 1936-07-07
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Expires: 1956-04-08
Abstract
No abstract record available.
Inventors
- 👤 Karl P Billner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:02
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/006; B28B7/00; B28B7/40; B28B7/46; C; C04; C04B; C04B40/00; C04B40/02; Y; Y10; Y10S; Y10S264/00; Y10S264/43; Y10S264/78; Y10T; Y10T24/00; Y10T24/40; Y10T24/4095
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) | 1939-07-07 | 1940-01-06 | 1940-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-07-07 | 1944-01-06 | 1944-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-07-07 | 1948-01-06 | 1948-07-07 | $7700.00 | Window Closed / Lapsed |