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US3517661A
Expired / Lapsed
US
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Differential plethysmography
Assignee: Philips Nuclear Medicine Inc
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Filing: 1967-04-24
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Granted: 1970-06-30
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Expires: 1987-04-24
Abstract
No abstract record available.
Inventors
- 👤 Marvin A Buffington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:17
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/022; A61B5/02233; A61B5/024; A61B5/026; A61B5/0285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2560237A
Cited
US2989051A
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US1788434A
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US2139509A
Cited
CH203545A
Cited
US2405265A
Cited
US2714379A
Cited
US3032030A
Cited
US3095873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |