US3060639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressing apparatus
Assignee: Prescon Corp
•
Filing: 1958-12-05
•
Granted: 1962-10-30
•
Expires: 1978-12-05
Abstract
No abstract record available.
Inventors
- 👤 James R Fields
- 👤 Ben W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:23
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/12; E04G21/121; Y; Y10; Y10S; Y10S29/00; Y10S29/042; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49874
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1655734A
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US831548A
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US1070572A
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US2009318A
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US2128832A
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US2180866A
Cited
US2728978A
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CH280389A
Cited
US2677957A
Cited
US2783024A
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US2941394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |