US3352298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater
Assignee: Individual
•
Filing: 1966-05-24
•
Granted: 1967-11-14
•
Expires: 1986-05-24
Abstract
No abstract record available.
Inventors
- 👤 Henry F Hope
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:02
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/40; F24H1/43
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A LIQUID HEATER INCLUDING: A CASING, AN OPEN COIL MOUNTED WITHIN SAID CASING FOR CONDUCTING THE LIQUID TO BE HEATED THROUGH SAID CASING, THE HELICES OF SAID COIL DEFINGING AN UNOBSTRUCTED INNER SPACE AND BEING SPACED FROM, AND COACTING WITH, THE WALL OF SAID CASING TO PROVIDE AN OUTER SPACE, THE HELICES OF SAID COIL BEING SPACED APART TO PROVIDE PASSAGES INTER-CONNECTING SAID INNER AND OUTER SPACES, A SOURCE OF HEAT DISPOSED ADJACENT ONE END OF SAID COIL FOR GENERATING HEATED GASES, AND A SUCTION FAN REGISTERING WITH SAID INNER SPACE AT THE OTHER END OF SAID COIL,
Claim 2
Dependent Claim
98 words
A LIQUID HEATER INCLUDING: A CASING, AN OPEN COIL MOUNTED WITHIN SAID CASING FOR CONDUCTING THE LIQUID TO BE HEATED THROUGH SAID CASING, THE HELICES OF SAID COIL DEFINGING AN UNOBSTRUCTED INNER SPACE AND BEING SPACED FROM, AND COACTING WITH, THE WALL OF SAID CASING TO PROVIDE AN OUTER SPACE, THE HELICES OF SAID COIL BEING SPACED APART TO PROVIDE PASSAGES INTER-CONNECTING SAID INNER AND OUTER SPACES, A SOURCE OF HEAT DISPOSED ADJACENT ONE END OF SAID COIL FOR GENERATING HEATED GASES, AND A SUCTION FAN REGISTERING WITH SAID INNER SPACE AT THE OTHER END OF SAID COIL,
References Cited (Backward Citations)
US1546038A
Cited
US1671448A
Cited
US2071624A
Cited
GB452231A
Cited
US2500499A
Cited
US2993479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |