US2916217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressurized pneumatic mechanical unit pulverizer
Assignee: Bituminous Coal Research Inc
•
Filing: 1955-01-12
•
Granted: 1959-12-08
•
Expires: 1975-01-12
Abstract
No abstract record available.
Inventors
- 👤 John I Yellott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:48
CPC Classifications
F; F02; F02C; F02C3/00; F02C3/20; F02C3/26; Y; Y10; Y10S; Y10S241/00; Y10S241/60
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |