US2765135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe support structure
Assignee: Stone and Webster Engineering Corp
•
Filing: 1953-04-16
•
Granted: 1956-10-02
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Expires: 1973-04-16
Abstract
No abstract record available.
Inventors
- 👤 Robert D Chellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:42
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/22; F16L3/223; F16L3/227
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1878100A
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US2287079A
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US2374624A
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US2380692A
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US2383544A
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US2540622A
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US2537437A
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US2567463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |