US2577441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating and drying system
Assignee: Individual
•
Filing: 1948-01-07
•
Granted: 1951-12-04
•
Expires: 1968-01-07
Abstract
No abstract record available.
Inventors
- 👤 Zaniroli Rene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:48
CPC Classifications
F; F26; F26B; F26B23/00; F26B23/02; F26B23/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US408285A
Cited
US510491A
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US1765916A
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GB191110274A
Cited
US1147463A
Cited
FR478656A
Cited
US1365807A
Cited
US1596143A
Cited
US1970766A
Cited
US2331875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-03 | 1955-06-04 | 1955-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-03 | 1959-06-04 | 1959-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-03 | 1963-06-04 | 1963-12-04 | $7700.00 | Window Closed / Lapsed |