Patent US2085104A successfully refreshed from Google Patents.
US3663799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoroplastic encapsulated electrical resistance heaters
Assignee: ANGUS H MCARN
•
Filing: 1970-10-12
•
Granted: 1972-05-16
•
Expires: 1990-10-12
Abstract
Abstract An electrical resistance immersion heater in which a resistance heater unit including an attached cold extension is encapsulated in a thin fluoroplastic sheathing. The cold extension and heater are capable of being formed in various shapes, the end of which is enclosed by means of a molded terminal ending.
Inventors
- 👤 Angus H Mcarn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:31
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
96 words
An electrical resistance immersion heater comprising an electrical resistance heating means including a deformable thin metallic housing therefor; a pair of cold extensions one attached to each end of said housing and adapted to carry electrical wire therethrough to connect said resistance means with a power source; at least one molded terminal at which each cold extension terminates; and an outer fluoroplastic sheathing tightly covering said housing and said cold extension in direct contact therewith whereby the housing and extension are rendered fluid resistant, said sheathing being from between about 0.012 and 0.020 inches in thickness.
Claim 2
Dependent Claim
96 words
An electrical resistance immersion heater comprising an electrical resistance heating means including a deformable thin metallic housing therefor; a pair of cold extensions one attached to each end of said housing and adapted to carry electrical wire therethrough to connect said resistance means with a power source; at least one molded terminal at which each cold extension terminates; and an outer fluoroplastic sheathing tightly covering said housing and said cold extension in direct contact therewith whereby the housing and extension are rendered fluid resistant, said sheathing being from between about 0.012 and 0.020 inches in thickness.
Claim 3
Dependent Claim
30 words
An electrical resistance immersion heater as set forth in claim 1 wherein said pair of cold extensions, one at each end of said housing come together in a contiguous relationship.
References Cited (Backward Citations)
US2888547A
Cited
US2982932A
Cited
US3045102A
Cited
US3097288A
Cited
US3113284A
Cited
US3225321A
Cited
US3257498A
Cited
US3356835A
Cited
US3441893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |