Patent US1417538A successfully refreshed from Google Patents.
US1417538A
Expired / Lapsed
US
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Converter plant
Assignee: Individual
•
Filing: 1920-08-26
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Granted: 1922-05-30
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Expires: 1940-08-26
Abstract
No abstract record available.
Inventors
- 👤 Mcgregor Alexander Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:20
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0026; C22B15/0028; C22B15/003; C22B15/0041; C22B15/0043
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) | 1925-05-29 | 1925-11-28 | 1926-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-05-29 | 1929-11-28 | 1930-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-05-29 | 1933-11-28 | 1934-05-30 | $7700.00 | Window Closed / Lapsed |