US2647370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water heating system
Assignee: JEFFERSON LAKE SULPHUR CO
•
Filing: 1950-01-31
•
Granted: 1953-08-04
•
Expires: 1970-01-31
Abstract
No abstract record available.
Inventors
- 👤 Ernest B Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:44
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/107; F22; F22B; F22B1/00; F22B1/22; F22B1/26; F22B1/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US594858A
Cited
US872806A
Cited
US1230417A
Cited
US2032368A
Cited
US2115338A
Cited
US2184845A
Cited
US2233675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |