US2985439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particle heater
Assignee: Universal Oil Products Co
•
Filing: 1958-04-02
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Granted: 1961-05-23
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Expires: 1978-04-02
Abstract
No abstract record available.
Inventors
- 👤 Scivally Herschell Robert
- 👤 James H Balentine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:08
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; B01J8/28; B01J8/1836; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00026; B01J2208/00035; B01J2208/00088; B01J2208/00327; B01J2208/00336; B01J2208/0038; B01J2208/00504; B01J2208/00513; B01J2208/0053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |