Patent US3407835A successfully refreshed from Google Patents.
US3407835A
Expired / Lapsed
US
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Insulated heating or cooling system for elongated pipes
Assignee: Trans Continental Electronics Corp
•
Filing: 1965-06-21
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Granted: 1968-10-29
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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
2026-11-02 05:13
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/18; F16L59/00; F16L59/14; F17; F17D; F17D3/00; F17D3/01; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6579
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |