Patent US1719492A successfully refreshed from Google Patents.
US1719492A
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US
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Regulator system
Assignee: AT&T Inc
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Filing: 1928-01-25
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Granted: 1929-07-02
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Expires: 1948-01-25
Abstract
No abstract record available.
Inventors
- 👤 Hugh M Stoller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:18
CPC Classifications
H; H02; H02P; H02P25/00; H02P25/16; H02P25/18; H02P25/182; H02P7/00; H02P7/06; H02P7/063; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/924
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) | 1932-07-01 | 1932-12-31 | 1933-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-07-01 | 1936-12-31 | 1937-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-07-01 | 1940-12-31 | 1941-07-02 | $7700.00 | Window Closed / Lapsed |