US2855919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating units
Assignee: —
•
Filing: —
•
Granted: 1958-10-14
•
Expires: 1975-10-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:33
CPC Classifications
—
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US86072A
Cited
US216677A
Cited
US707053A
Cited
US1067009A
Cited
US1488416A
Cited
US1637983A
Cited
US1885674A
Cited
US1871574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |