US3398262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe heating arrangement
Assignee: Electro Trace Corp
•
Filing: 1967-09-14
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Granted: 1968-08-20
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Expires: 1987-09-14
Abstract
No abstract record available.
Inventors
- 👤 Walter C Kahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:46
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; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB527759A
Cited
US2274839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |