US2464052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating unit for pipes
Assignee: Individual
•
Filing: 1947-01-13
•
Granted: 1949-03-08
•
Expires: 1967-01-13
Abstract
No abstract record available.
Inventors
- 👤 Numrich John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:13
CPC Classifications
H; H05; H05B; H05B3/00; E; E04; E04D; E04D13/00; E04D13/04; E04D13/08; E04D2013/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1697040A
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US1642197A
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US1841864A
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US2015209A
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US1936391A
Cited
US1997146A
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US2022662A
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US2111251A
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US2286161A
Cited
US2389466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |