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US2865078A
Expired / Lapsed
US
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Device for use in the manufacture of spigot and socket pipes of concrete having pre-tensioned reinforcements
Assignee: TRYCKROR AB
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Filing: 1955-06-27
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Granted: 1958-12-23
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Expires: 1975-06-27
Abstract
No abstract record available.
Inventors
- 👤 Hasselblad Erik David Valter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:37
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/02; B28B21/10; B28B21/18; B28B21/56; B28B21/60; B28B21/70; B28B21/74; Y; Y10; Y10S; Y10S425/00; Y10S425/019; Y10S425/044
Claims Analysis
Total Claims: 0
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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) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |