Patent US4113251A successfully refreshed from Google Patents.
Patent US3553970A successfully refreshed from Google Patents.
US3553970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflatable clamping device
Assignee: Individual
•
Filing: 1968-11-26
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Granted: 1971-01-12
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Expires: 1988-11-26
Abstract
Abstract AN INFLATABLE CLAMPING DEVICE IS PROVIDED FOR APPLYING PRESSURE TO A COATING ON A SUBMERGED PILE STRUCTURE AS THE COATING IS BEING CURED. THE DEVICE IS FORMED BY ATTACHING TWO SHEETS OF FLEXIBLE MATERIAL TOGETHER TO FORM A FLUID-TIGHT CHAMBER THEREBETWEEN WITH THE TWO SHEETS BEING WRAPPED AROUND THE COATED MATERIAL AND A FLUID UNDER PRESSURE INTRODUCED TO THE CHAMBER BETWEEN THE SHEETS TO APPLY A PRESSURE AGAINST THE COATING. THE INNER SHEET IS FORMED OF SUFFICIENT MATERIAL SO AS TO CONFORM TO THE CONFIGURATION OF THE PILE, SUCH AS WHEN THE PILE HAS AN H-SECTION.
Inventors
- 👤 George C Wiswell Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:46
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/22; E02D5/226
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |