US2671940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding apparatus
Assignee: VACUUM CONCRETE Inc
•
Filing: 1949-02-07
•
Granted: 1954-03-16
•
Expires: 1969-02-07
Abstract
No abstract record available.
Inventors
- 👤 Karl P Billner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:07
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/02; B28B3/021; B28B21/00; B28B21/02; B28B21/10; B28B21/36; B28B7/00; B28B7/40; B28B7/46; Y; Y10; Y10S; Y10S264/00; Y10S264/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191406751A
Cited
US1634047A
Cited
US1945145A
Cited
US2048253A
Cited
US2046867A
Cited
US2296018A
Cited
US2311588A
Cited
US2411043A
Cited
US2375148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |