US3592198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Obstetrical instrument for fetus extraction
Assignee: Individual
•
Filing: 1967-10-31
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Granted: 1971-07-13
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Expires: 1987-10-31
Abstract
Abstract A surgical instrument, such as an obstetrical forceps has a flexible member made of vinyl plastic sheets. The member has closed wall portions that form a caplike shape. A capillary network inside the walls of the member is connected through a flexible tube to a source of temperature-controlled circulating water. A thermosensitive compound surrounds the network and forms a matrix of compound that is softened or hardened by changes in the water temperature. While the matrix is soft, the caplike member is fitted like a glove on the fetal skull; the matrix is then hardened, making the forceps self-retaining.
Inventors
- 👤 Evan F Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:32
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/42; A61B17/44; A61B17/442
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
An obstetrical forceps comprising, a. a flexible member, having closed wall portions defining a cavity and forming a caplike shape, made of a physiologically inert and nontoxic material; b. means, secured thereto, for manipulating the member; c. a hardenable compound in said cavity; and d. a sealable opening in the member, including means for supplying a hardening agent to said cavity, thereby to harden the compound, making the forceps self-retaining.
Claim 2
Dependent Claim
70 words
An obstetrical forceps comprising, a. a flexible member, having closed wall portions defining a cavity and forming a caplike shape, made of a physiologically inert and nontoxic material; b. means, secured thereto, for manipulating the member; c. a hardenable compound in said cavity; and d. a sealable opening in the member, including means for supplying a hardening agent to said cavity, thereby to harden the compound, making the forceps self-retaining.
Claim 3
Dependent Claim
16 words
The obstetrical forceps according to claim 1 in which the hardenable compound is a thermosensitive composition.
Claim 4
Dependent Claim
14 words
The obstetrical forceps according to claim 2 in which the hardenable compound comprises 2,3-Dimethyl-2,3-butanediol.
Claim 5
Dependent Claim
14 words
The obstetrical forceps according to claim 2 in which the hardenable compound comprises 1-Tetradecanol.
Claim 6
Dependent Claim
98 words
An obstetrical forceps comprising: a. a flexible member, having closed wall portions defining a cavity and forming a caplike shape, the member being made of a physiologically inert and nontoxic material; b. a capillary network in said cavity; c. means, secured thereto, for manipulating the member; d. a hardenable compound surrounding the network in said cavity, thereby forming a matrix of hardenable compound; and e. a sealable opening in the member, including means, coupled to the capillary network, for supplying a hardening agent to the capillary network, thereby to solidify the matrix of compound, making the forceps self-retaining.
Claim 7
Dependent Claim
98 words
An obstetrical forceps comprising: a. a flexible member, having closed wall portions defining a cavity and forming a caplike shape, the member being made of a physiologically inert and nontoxic material; b. a capillary network in said cavity; c. means, secured thereto, for manipulating the member; d. a hardenable compound surrounding the network in said cavity, thereby forming a matrix of hardenable compound; and e. a sealable opening in the member, including means, coupled to the capillary network, for supplying a hardening agent to the capillary network, thereby to solidify the matrix of compound, making the forceps self-retaining.
Claim 8
Dependent Claim
16 words
The obstetrical forceps according to claim 5 in which the hardenable compound is a thermosensitive composition.
Claim 9
Dependent Claim
14 words
The obstetrical forceps according to claim 6 in which the hardenable compound comprises 2,3-Dimethyl-2,3-butaneDiol.
Claim 10
Dependent Claim
14 words
The obstetrical forceps according to claim 6 in which the hardenable compound comprises 1-Tetradecanol.
References Cited (Backward Citations)
FR327021A
Cited
US1782814A
Cited
US2194989A
Cited
US3048169A
Cited
US3227154A
Cited
US3312222A
Cited
US3375822A
Cited
US3403676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |