Patent US2850299A successfully refreshed from Google Patents.
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 22:44
CPC Classifications
F; F16; F16L; F16L19/00; F16L19/02; F16L19/0212; F16L19/0218; F16L25/00; F16L25/02; F16L25/023
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US476188A
Cited
US602564A
Cited
US646742A
Cited
US718826A
Cited
FR616577A
Cited
US1678955A
Cited
US2211776A
Cited
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 |