US3515132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intrauterine contraceptive device
Assignee: Individual
•
Filing: 1967-12-26
•
Granted: 1970-06-02
•
Expires: 1987-12-26
Abstract
No abstract record available.
Inventors
- 👤 Charles Allen Mcknight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:52
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/142; A61F6/144
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US982996A
Cited
US1039061A
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DE302176C
Cited
US2122579A
Cited
US2564177A
Cited
GB782496A
Cited
US3234938A
Cited
GB981389A
Cited
US3312215A
Cited
US3353533A
Cited
US3397690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |