US3377464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric resistance heating and insulating system for elongated pipes
Assignee: Trans Continental Electronics Corp
•
Filing: 1965-06-21
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Granted: 1968-04-09
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Expires: 1985-06-21
Abstract
No abstract record available.
Inventors
- 👤 Rolfes Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:19
CPC Classifications
H; H05; H05B; H05B3/00; F; F16; F16L; F16L53/00; F16L53/30; F16L53/35; F16L53/38; F24; F24H; F24H1/00; F24H1/10; F24H1/12; F24H1/14; F24H1/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1806942A
Cited
CH44565A
Cited
US1237862A
Cited
FR847074A
Cited
GB527759A
Cited
US2686109A
Cited
US2761949A
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US2894538A
Cited
GB962180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |