Patent US2956790A successfully refreshed from Google Patents.
US2956790A
Expired / Lapsed
US
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Apparatus for producing mechanically aerated concrete
Assignee: Individual
•
Filing: 1957-08-29
•
Granted: 1960-10-18
•
Expires: 1977-08-29
Abstract
No abstract record available.
Inventors
- 👤 Saburo M Moriya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:22
CPC Classifications
B; B28; B28C; B28C5/00; B28C5/08; B28C5/18; B28C5/1825; B28C5/185; B01; B01F; B01F35/00; B01F35/30; B01F35/32; B01F35/321; B01F35/3213
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |