Patent US3519023A successfully refreshed from Google Patents.
US3519023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defrosting collar for pipes
Assignee: ORA W BURNS SR
•
Filing: 1968-08-05
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Granted: 1970-07-07
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Expires: 1988-08-05
Abstract
No abstract record available.
Inventors
- 👤 Ora W Burns Sr
- 👤 Richmond R Simmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:06
CPC Classifications
E; E03; E03B; E03B7/00; E03B7/09; E03B7/14; F; F16; F16L; F16L53/00; F16L53/30; F16L53/35
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1316190A
Cited
US1416750A
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US1971387A
Cited
CH208911A
Cited
US2452367A
Cited
US2572695A
Cited
US2718585A
Cited
US3393297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |