US2852991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed pavements
Assignee: Preload Co Inc
•
Filing: 1953-12-03
•
Granted: 1958-09-23
•
Expires: 1973-12-03
Abstract
No abstract record available.
Inventors
- 👤 Dobell Curzon
- 👤 Eric C Molke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:01
CPC Classifications
B; B28; B28B; B28B23/00; B28B23/02; B28B23/22; E; E01; E01C; E01C7/00; E01C7/08; E01C7/10; E01C7/14; E01C7/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |