Patent US3423570A successfully refreshed from Google Patents.
US3423570A
Expired / Lapsed
US
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Electrical radiant heating system for fluid-receiving conduit structures
Assignee: Individual
•
Filing: 1966-03-21
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Granted: 1969-01-21
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Expires: 1986-03-21
Abstract
No abstract record available.
Inventors
- 👤 William J Trabilcy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:07
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/105; H05B6/108; H05B3/00; H05B3/40; H05B3/42; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1710943A
Cited
US1920685A
Cited
US1971387A
Cited
US2459816A
Cited
US2792895A
Cited
US3031563A
Cited
US3257498A
Cited
US3377464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |