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Patent US1731264A successfully refreshed from Google Patents.
US1731264A
Expired / Lapsed
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Apparatus for controlling the output of alternating-current generators
Assignee: AT&T Inc
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Filing: 1928-03-01
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Granted: 1929-10-15
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Expires: 1948-03-01
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Potter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:24
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/06
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) | 1932-10-14 | 1933-04-15 | 1933-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-10-14 | 1937-04-15 | 1937-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-10-14 | 1941-04-15 | 1941-10-15 | $7700.00 | Window Closed / Lapsed |