Patent US2687718A successfully refreshed from Google Patents.
US2687718A
Expired / Lapsed
US
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Apparatus for producing modulated pulsations
Assignee: Individual
•
Filing: 1950-08-14
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Granted: 1954-08-31
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Expires: 1970-08-14
Abstract
No abstract record available.
Inventors
- 👤 Charles F Britton
- 👤 Jack E Harrier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:22
CPC Classifications
A; A61; A61H; A61H23/00; A61H23/02; A61H23/0254; A61H23/0263; A61H2023/0281; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18544; Y10T74/18552
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US952565A
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US1676285A
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US2018046A
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US1988316A
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GB431366A
Cited
US2140441A
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US2352049A
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US2488693A
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US2489582A
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US2479013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |