Patent US2375889A successfully refreshed from Google Patents.
Patent US2741007A successfully refreshed from Google Patents.
US2741007A
Expired / Lapsed
US
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Device for the formation of compressed building elements by means of the expansion of tubes, sacks or other elements made of flexible material within rigid forms
Assignee: Individual
•
Filing: 1949-11-09
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Granted: 1956-04-10
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Expires: 1969-11-09
Abstract
No abstract record available.
Inventors
- 👤 Locatelli Antonio Vittorio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:12
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/28; B28B7/30; B28B7/32; B28B7/0029; B28B7/0035
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) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |