US2812541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing scale from pellet mills
Assignee: Phillips Petroleum Co
•
Filing: 1955-05-16
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Granted: 1957-11-12
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Expires: 1975-05-16
Abstract
No abstract record available.
Inventors
- 👤 George J Webster
- 👤 Jesus S Martinez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:41
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/60; B; B01; B01J; B01J2/00; B01J2/12; B29; B29B; B29B9/00; B29B9/02; B29B9/06; Y; Y10; Y10S; Y10S159/00; Y10S159/13; Y10S159/29
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) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |