US2857755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means of prestressing
Assignee: Individual
•
Filing: 1953-07-22
•
Granted: 1958-10-28
•
Expires: 1973-07-22
Abstract
No abstract record available.
Inventors
- 👤 Werth Adam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:38
CPC Classifications
B; B28; B28B; B28B23/00; B28B23/02; B28B23/04; B28B23/043; E; E04; E04G; E04G21/00; E04G21/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE501781A
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US393037A
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US922530A
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US2226201A
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GB628773A
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US2596495A
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GB656240A
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GB694596A
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US2781658A
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US2727293A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |