US2516453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of prefabricating parts for concrete structures
Assignee: Preload Enterprises Inc
•
Filing: 1946-02-14
•
Granted: 1950-07-25
•
Expires: 1966-02-14
Abstract
No abstract record available.
Inventors
- 👤 Dobell Curzon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:57
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/22; B28B7/34; B28B7/342; Y; Y10; Y10S; Y10S425/00; Y10S425/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1111131A
Cited
US1416844A
Cited
GB127389A
Cited
US1398209A
Cited
US1460676A
Cited
US1869265A
Cited
US2112452A
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US2364522A
Cited
GB773709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |