US2164228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorus charging method and apparatus
Assignee: Individual
•
Filing: 1938-02-16
•
Granted: 1939-06-27
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Expires: 1958-02-16
Abstract
No abstract record available.
Inventors
- 👤 John R Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:54
CPC Classifications
F; F27; F27D; F27D3/00; C; C22; C22C; C22C1/00; C22C1/06; C22C28/00; F27B; F27B14/00; F27B14/08; F27B14/0806; F27D3/16; F27D2003/166; F27D21/00; F27D21/0035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-06-26 | 1942-12-26 | 1943-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-06-26 | 1946-12-26 | 1947-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-06-26 | 1950-12-26 | 1951-06-27 | $7700.00 | Window Closed / Lapsed |