US3260020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentric chambered prestressed unit
Assignee: CIE D INGENIEURS ET TECHNICIEN
•
Filing: 1963-05-23
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Granted: 1966-07-12
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Expires: 1983-05-23
Abstract
No abstract record available.
Inventors
- 👤 Patin Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:33
CPC Classifications
E; E04; E04H; E04H7/00; E04H7/02; E04H7/18; E04H7/20; B; B28; B28B; B28B21/00; B28B21/56; B28B21/60; E04G; E04G21/00; E04G21/12; E04G2021/127
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A PRESTRESSED UNIT COMPRISING A SUBSTANTIALLY CLOSED CONCRETE INNER CHAMBER, A PLURALITY OF METAL REINFORCEMENTS SURROUNDING THE CHAMBER AND SPACED THEREFROM, A CONCRETE SHELL COVERING SAID REINFORCEMENTS AND DEFINING A CAVITY AROUND THE INNER CHAMBER, A FLUID TIGHT LAYER
Claim 2
Dependent Claim
39 words
A PRESTRESSED UNIT COMPRISING A SUBSTANTIALLY CLOSED CONCRETE INNER CHAMBER, A PLURALITY OF METAL REINFORCEMENTS SURROUNDING THE CHAMBER AND SPACED THEREFROM, A CONCRETE SHELL COVERING SAID REINFORCEMENTS AND DEFINING A CAVITY AROUND THE INNER CHAMBER, A FLUID TIGHT LAYER
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
FR1208027A
Cited
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Cited
US3107158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |