Patent US2853250A successfully refreshed from Google Patents.
US2853250A
Expired / Lapsed
US
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Apparatus for imparting stresses to structural members
Assignee: Individual
•
Filing: 1953-06-16
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Granted: 1958-09-23
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Expires: 1973-06-16
Abstract
No abstract record available.
Inventors
- 👤 Theodore R Crom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:21
CPC Classifications
B; B65; B65H; B65H81/00; B28; B28B; B28B23/00; B28B23/02; B28B23/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1375745A
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US2250269A
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US2579183A
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US2520402A
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US2415500A
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FR953924A
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US2480180A
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US2605976A
Cited
US2641084A
Cited
US2663515A
Cited
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 |