Patent US3107158A successfully refreshed from Google Patents.
US3107158A
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US
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Method for the manufacture of pipes of concrete having prestressed longitudinal and annular reinforcements
Assignee: Skanska AB
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Filing: 1961-02-06
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Granted: 1963-10-15
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Expires: 1981-02-06
Abstract
No abstract record available.
Inventors
- 👤 Ahlberg Anders Emrik August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:15
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/70; B28B21/72; B28B21/56; B28B21/60; Y; Y10; Y10S; Y10S425/00; Y10S425/019; Y10S425/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2048253A
Cited
US2311358A
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US2582751A
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US2579801A
Cited
US2709845A
Cited
FR1113484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-14 | 1967-04-15 | 1967-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-14 | 1971-04-15 | 1971-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-14 | 1975-04-15 | 1975-10-15 | $7700.00 | Window Closed / Lapsed |