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Patent US3323520A successfully refreshed from Google Patents.
US3323520A
Expired / Lapsed
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Intrauterine pessary
Assignee: Individual
•
Filing: 1965-04-13
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Granted: 1967-06-06
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Expires: 1985-04-13
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:32
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0034; A61K9/0039; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
AN INTRAUTERINE PESSARY COMPRISING AN ENDLESS HELICAL SPRING, GENERALLY CIRCULAR IN CROSS SECTION, AND A PLURALITY OF FLAT-BODIED CIRCULAR MEMBERS, STACKED ONE UPON THE OTHER, AND EACH APPROXIMATING IN DIMENSION THE DIAMETER OF SAID SPRING, DISPOSED AS A CORE WITHIN SAID SPRING AND EFFECTIVE TO PROMOTE DISTORTION OF SAID PESSARY INTO A SEMICIRCULAR SHAPE UPON THE APPLICATION OF COMPRESSIVE FORCES AGAINST THE PESSARY.
Claim 2
Dependent Claim
63 words
AN INTRAUTERINE PESSARY COMPRISING AN ENDLESS HELICAL SPRING, GENERALLY CIRCULAR IN CROSS SECTION, AND A PLURALITY OF FLAT-BODIED CIRCULAR MEMBERS, STACKED ONE UPON THE OTHER, AND EACH APPROXIMATING IN DIMENSION THE DIAMETER OF SAID SPRING, DISPOSED AS A CORE WITHIN SAID SPRING AND EFFECTIVE TO PROMOTE DISTORTION OF SAID PESSARY INTO A SEMICIRCULAR SHAPE UPON THE APPLICATION OF COMPRESSIVE FORCES AGAINST THE PESSARY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |