US3379901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fetal heart transducer and method of manufacture
Assignee: Individual
•
Filing: 1965-01-08
•
Granted: 1968-04-23
•
Expires: 1985-01-08
Abstract
No abstract record available.
Inventors
- 👤 James R Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:10
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/42; A61B8/4272; A61B8/4281; A61B8/44; A61B8/4483; A61B8/48; A61B8/488; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0622; B06B1/0625; G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/32; Y; Y10; Y10T; Y10T29/00; Y10T29/42; Y10T29/49; Y10T29/49002; Y10T29/49005; Y10T29/49007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2458288A
Cited
US2748369A
Cited
US3019636A
Cited
US3166730A
Cited
US3239696A
Cited
US3277451A
Cited
US3302044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |