Patent US2793802A successfully refreshed from Google Patents.
Patent US2701731A successfully refreshed from Google Patents.
US2701731A
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US
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Reinforced large diameter coupling
Assignee: Dresser Industries Inc
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Filing: 1949-05-13
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Granted: 1955-02-08
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Expires: 1969-05-13
Abstract
No abstract record available.
Inventors
- 👤 Roger E Risley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:17
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US364449A
Cited
US436574A
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US552319A
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US1363974A
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US754258A
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US841881A
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US1680499A
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US1813529A
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US1853168A
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US1940729A
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US2009744A
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US2001614A
Cited
US2108848A
Cited
US2197450A
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US2438472A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-07 | 1958-08-09 | 1959-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-07 | 1962-08-09 | 1963-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-07 | 1966-08-09 | 1967-02-08 | $7700.00 | Window Closed / Lapsed |