Patent US2452898A successfully refreshed from Google Patents.
US2452898A
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US
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Internal heat intensifier
Assignee: Individual
•
Filing: 1945-05-03
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Granted: 1948-11-02
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Expires: 1965-05-03
Abstract
No abstract record available.
Inventors
- 👤 Earl C Bourdette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:22
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; F24D; F24D5/00; F24D5/06; F24D5/08; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87788; Y10T137/87812
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1024161A
Cited
US1579230A
Cited
US2013193A
Cited
US2198136A
Cited
US2331907A
Cited
US2314086A
Cited
US2286854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-02 | 1952-05-03 | 1952-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-02 | 1956-05-03 | 1956-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-02 | 1960-05-03 | 1960-11-02 | $7700.00 | Window Closed / Lapsed |