US2739009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamps with pre-stressed and pre-set flexible grab arms
Assignee: Shell Development Co
•
Filing: 1952-12-29
•
Granted: 1956-03-20
•
Expires: 1972-12-29
Abstract
No abstract record available.
Inventors
- 👤 Clifton H Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:03
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/18; B66F9/183; B66F9/187
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1770933A
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US1770932A
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US1929447A
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US2039398A
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US2364494A
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US2370528A
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US2367552A
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US2415240A
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US2620552A
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US2561896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |