US2556107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid heating system
Assignee: Individual
•
Filing: 1948-02-17
•
Granted: 1951-06-05
•
Expires: 1968-02-17
Abstract
No abstract record available.
Inventors
- 👤 Roswell Charles Neil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:45
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/16; F28D7/163; F28D7/1638; F24; F24D; F24D19/00; F24D19/08; F24D19/081; F28B; F28B1/00; F28B1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1312512A
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US1252593A
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US1599334A
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US1543911A
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US1629028A
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US1845622A
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US2181602A
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US2216939A
Cited
US2191179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-04 | 1954-12-04 | 1955-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-04 | 1958-12-04 | 1959-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-04 | 1962-12-04 | 1963-06-05 | $7700.00 | Window Closed / Lapsed |