US4155355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circular surgical retractor apparatus
Assignee: Individual
•
Filing: 1977-03-11
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Granted: 1979-05-22
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Expires: 1997-03-11
Abstract
Abstract A circular surgical retractor apparatus which is characterized by providing a metal bar ring having continuous arc-shaped concaves on its internal and external circumferences, providing hooks at appropriate places on the lower surface of surgical clamps having a clamping head which is a hollow and curved frame of a metal bar, and engaging the hooks with the metal bar ring.
Inventors
- 👤 Hideo Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:29
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/02; A61B17/0293
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A circular surgical retractor comprising: a circular metal bar ring having continuous arc-shaped concaves on its internal and external circumferences; and a plurality of surgical clamps engageable with said arc-shaped concaves of said ring, each surgical clamp being comprised of: a single rod-like body portion; a plurality of hooks extending downward from said body portion and engageable with said arc-shaped concaves to prevent said body portion from moving radially toward the center of said ring; an open, curved tissue-retaining head member at one end of said body portion; and a holding ring at the end of said body portion opposite said head.
Claim 2
Dependent Claim
102 words
A circular surgical retractor comprising: a circular metal bar ring having continuous arc-shaped concaves on its internal and external circumferences; and a plurality of surgical clamps engageable with said arc-shaped concaves of said ring, each surgical clamp being comprised of: a single rod-like body portion; a plurality of hooks extending downward from said body portion and engageable with said arc-shaped concaves to prevent said body portion from moving radially toward the center of said ring; an open, curved tissue-retaining head member at one end of said body portion; and a holding ring at the end of said body portion opposite said head.
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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |