Patent US2590323A successfully refreshed from Google Patents.
US2590323A
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US
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Electrical apparatus
Assignee: HUGH TEVIS
•
Filing: 1947-12-30
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Granted: 1952-03-25
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Expires: 1967-12-30
Abstract
No abstract record available.
Inventors
- 👤 Arthur M J Janser
- 👤 Charles S Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:21
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US653078A
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US743432A
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US1050260A
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US1334962A
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US1505669A
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US1768891A
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US1875671A
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US2408908A
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US2262995A
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US2364940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |