US3498071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and process for freezing liquid in a section of a pipe
Assignee: Individual
•
Filing: 1968-08-07
•
Granted: 1970-03-03
•
Expires: 1988-08-07
Abstract
No abstract record available.
Inventors
- 👤 Harry H Tremont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:27
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/103; F16L53/00; F16L53/70; F25; F25D; F25D3/00; F25D3/10; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0402; Y10T137/0441; Y10T137/6416; Y10T137/6579
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2483082A
Cited
US3041850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |