US1526718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for the prevention of freezing of liquid in a pipe line
Assignee: WALTER C COLLINS
•
Filing: 1922-09-26
•
Granted: 1925-02-17
•
Expires: 1942-09-26
Abstract
No abstract record available.
Inventors
- 👤 Opp Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:44
CPC Classifications
E; E03; E03B; E03B7/00; E03B7/09; E03B7/10; E03B7/12; F; F16; F16K; F16K17/00; F16K17/36; F16K17/38; F16K31/00; F16K31/002; F16K31/02; F16K31/025; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391; Y10T137/1189; Y10T137/1244; Y10T137/1842; Y10T137/1939; Y10T137/1963; Y10T137/6416; Y10T137/6497; Y10T137/6851; Y10T137/6966; Y10T137/6969; Y10T137/7722; Y10T137/7737
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-02-17 | 1928-08-18 | 1929-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-02-17 | 1932-08-18 | 1933-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-02-17 | 1936-08-18 | 1937-02-17 | $7700.00 | Window Closed / Lapsed |