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US2667159A
Expired / Lapsed
US
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Plethysmograph
Assignee: Individual
•
Filing: 1948-12-21
•
Granted: 1954-01-26
•
Expires: 1968-12-21
Abstract
No abstract record available.
Inventors
- 👤 Harold D Goldberg
- 👤 Milton I Goldberg
- 👤 Heinz I Lippmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:02
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/026; A61B5/0295
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2352874A
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US1610971A
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US1594053A
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DE557433C
Cited
AT132204B
Cited
DE687916C
Cited
US2124579A
Cited
US2184511A
Cited
US2266231A
Cited
US2452799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |