US2548508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal system
Assignee: Individual
•
Filing: 1946-03-05
•
Granted: 1951-04-10
•
Expires: 1966-03-05
Abstract
No abstract record available.
Inventors
- 👤 Alfred S Wolfner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:51
CPC Classifications
F; F01; F01K; F01K25/00; F01K25/08; F01K25/10; F01K25/106; F01K23/00; F01K23/02; F01K23/06; F01K23/065; F02; F02C; F02C7/00; F02C7/12; F02C7/14; F02C7/141; F02C7/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1230617A
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DE453513C
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US1809409A
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US1669530A
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US2009067A
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US2186706A
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US2249882A
Cited
US2192367A
Cited
US2322717A
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US2339185A
Cited
US2362714A
Cited
US2385033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |