US3492996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventriculo-atrial shunt
Assignee: Dow Silicones Corp
•
Filing: 1966-02-09
•
Granted: 1970-02-03
•
Expires: 1986-02-09
Abstract
No abstract record available.
Inventors
- 👤 Edmund M Fountain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:19
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/02; A61M25/04; A61M27/00; A61M27/002; A61M27/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2616429A
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US2969066A
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US3020913A
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US3108595A
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US3111125A
Cited
US3233610A
Cited
US3288142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |