Patent US1268545A successfully refreshed from Google Patents.
US1268545A
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US
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Sinusoidal-wave generator.
Assignee: T M CHAPMAN'S SONS' Co
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Filing: 1917-03-10
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Granted: 1918-06-04
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Expires: 1937-03-10
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:19
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/26
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) | 1921-06-03 | 1921-12-03 | 1922-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-06-03 | 1925-12-03 | 1926-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-06-03 | 1929-12-03 | 1930-06-04 | $7700.00 | Window Closed / Lapsed |