US3089016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating unit
Assignee: Vibrantz Corp
•
Filing: 1959-08-17
•
Granted: 1963-05-07
•
Expires: 1979-08-17
Abstract
No abstract record available.
Inventors
- 👤 William D Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:26
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/48; H05B3/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
72 words
A HEATING UNIT COMPRISING, A TUBULAR HEATING ELEMENT HAVING A PLURALITY OF FINS THEREON ECH COMPRISING A PLATE OF HEAT CONDUCTIVE MATERIAL WITH A TUBE RECEIVING OPENING THEREIN SURROUNDED BY A COLLAR PORTION WHICH FRICTIONALLY ENGAGES THE SURFACE OF THE TUBE, SAID FINS HAVING KEY PORTIONS DEFINED BY FOLDS IN SAID FINS EXTENDING OUTWARDLY A SUBSTANTIAL DISTANCE FROM SAID TUBE AND KEYED TO AN ADJACENT FIN FOR MAINTAINING ALIGNMENT OF SAID FINS.
References Cited (Backward Citations)
US2899178A
Cited
FR356047A
Cited
US982735A
Cited
US1052998A
Cited
US1320430A
Cited
US1720334A
Cited
US1791517A
Cited
US1710579A
Cited
US1673370A
Cited
US1902350A
Cited
US1997844A
Cited
US2089340A
Cited
US2026412A
Cited
US2051930A
Cited
US2088586A
Cited
US2170174A
Cited
US2170175A
Cited
US2307355A
Cited
US2591442A
Cited
US2452875A
Cited
US2656808A
Cited
US2557760A
Cited
US2810815A
Cited
US2803734A
Cited
US2896426A
Cited
US3010091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |