US2483175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding prestressed structures
Assignee: VACUUM CONCRETE Inc
•
Filing: 1947-10-10
•
Granted: 1949-09-27
•
Expires: 1967-10-10
Abstract
No abstract record available.
Inventors
- 👤 Karl P Billner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:28
CPC Classifications
B; B28; B28B; B28B23/00; B28B23/02; B28B23/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB338934A
Cited
US1965748A
Cited
US2048253A
Cited
US2226201A
Cited
US2414011A
Cited
US2319105A
Cited
US2413990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-26 | 1953-03-28 | 1953-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-26 | 1957-03-28 | 1957-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-26 | 1961-03-28 | 1961-09-27 | $7700.00 | Window Closed / Lapsed |