US2850299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible insulating coupling for threaded pipe
Assignee: Dresser Industries Inc
•
Filing: 1953-09-22
•
Granted: 1958-09-02
•
Expires: 1973-09-22
Abstract
No abstract record available.
Inventors
- 👤 Roger E Risley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:04
CPC Classifications
F; F16; F16L; F16L19/00; F16L19/02; F16L19/0212; F16L19/0218; F16L25/00; F16L25/02; F16L25/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US476188A
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US602564A
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US646742A
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US718826A
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FR616577A
Cited
US1678955A
Cited
US2211776A
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US2278479A
Cited
US2269695A
Cited
FR891167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |