US3116394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater
Assignee: Weldotron of Delaware Inc
•
Filing: 1962-02-02
•
Granted: 1963-12-31
•
Expires: 1982-02-02
Abstract
No abstract record available.
Inventors
- 👤 Lloyd H Barton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:45
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/002
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A HEATING SECTION FOR A HEATER, COMPRISING A HOLLOW TUBULAR MEMBER HAVING OPPOSITE OPEN ENDS FOR THE FLOW OF A GASEOUS FLUID LONGITUDINALLY THROUGH SAID MEMBER FOR THE HEATING OF SAID FLUID, AN ELECTRIC RESISTANCE WIRE POSITIONED IN SAID MEMBER IN THE PATH OF FLOW OF SAID FLUID FOR THE HEATING THEREOF, EACH END OF SAID MEMBER BEING CYLINDRICAL, AND ONE END OF SAID MEMBER HAVING AN OUTSIDE DIAMETER SLIGHTLY LESS THAN THE INSIDE DIAMETER OF ITS OPPOSITE END TO PERMIT A PLURALITY OF SAID MEMBERS TO BE RELEASABLY CONNECTED TO EACH OTHER IN END-TO-END RELATION AND RELEASABLY HELD IN SAID POSITION BY FRICTION ONLY.
References Cited (Backward Citations)
US2901521A
Cited
US1649421A
Cited
US1823067A
Cited
US2171253A
Cited
US2401037A
Cited
US2527013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |