US2418015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating apparatus
Assignee: Individual
•
Filing: 1944-07-01
•
Granted: 1947-03-25
•
Expires: 1964-07-01
Abstract
No abstract record available.
Inventors
- 👤 Donald Archibald
- 👤 Jacobstein Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:34
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/18; F24H1/186
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US569637A
Cited
US762541A
Cited
DE559201C
Cited
US1862065A
Cited
US1944894A
Cited
US1937335A
Cited
US2024508A
Cited
US2007426A
Cited
US2014135A
Cited
US2162337A
Cited
US2151108A
Cited
US2242588A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-24 | 1950-09-23 | 1951-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-24 | 1954-09-23 | 1955-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-24 | 1958-09-23 | 1959-03-25 | $7700.00 | Window Closed / Lapsed |