US2989357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Obstetric labor pain recorder
Assignee: Individual
•
Filing: 1956-04-13
•
Granted: 1961-06-20
•
Expires: 1976-04-13
Abstract
No abstract record available.
Inventors
- 👤 Wallace A Verrett
- 👤 Hazel V Hebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:36
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/48; A61B5/4824; A61B5/03; A61B5/033; A61B5/43; A61B5/4306; A61B5/4343; A61B5/4356
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US349780A
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US414963A
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US2556645A
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US1181511A
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US2208633A
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US2239330A
Cited
US2447018A
Cited
US2708367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |