Patent US3409266A successfully refreshed from Google Patents.
US3409266A
Expired / Lapsed
US
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Shoring structure for concrete forms
Assignee: Economy Forms Corp
•
Filing: 1965-08-30
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Granted: 1968-11-05
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Expires: 1985-08-30
Abstract
No abstract record available.
Inventors
- 👤 William A Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:09
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/36; E04G11/38; E04G11/48; E04G11/486; E04G17/00; E04G17/04; E04G25/00; E04G25/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US437935A
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US1293838A
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US1498665A
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US1500564A
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US1907877A
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US2656224A
Cited
US3130470A
Cited
US3314638A
Cited
US3239188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |