US3828781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for withdrawing menstrual fluid
Assignee: Individual
•
Filing: 1971-12-06
•
Granted: 1974-08-13
•
Expires: 1991-12-06
Abstract
Abstract A method and apparatus whereby substantially all of the menstrual fluid incident to a normal monthly ''''period'''' may be removed in a small fraction of an hour. A simple plastic syringe is employed in combination with a valve to create a suction pump incapable of injecting air into the uterus. Such pump and an associated receptacle are connected to a semirigid plastic cannula having an outer diameter of about 4 mm, and such cannula is inserted through the undilated cervix. The cannula fits snugly into the cervical lumen so that the applied suction draws fluid out of the uterus. The menstrual extraction procedure is performed at the time when the normal monthly period starts, or is estimated to start.
Inventors
- 👤 E Rothman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:04
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/80; A61M1/81; A61M1/84; A61M1/87; A61M2202/00; A61M2202/04; A61M2202/0494; A61M2205/00; A61M2205/07; A61M2205/071; A61M2205/073; A61M2210/00; A61M2210/14; A61M2210/1433
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
A method of taking care of the menstrual requirements of a woman, which comprises: determining the date on which the normal menstrual flow of a woman is due to start or is actually starting, providing a semirigid cannula having opening means near the tip thereof, the outer diameter of said cannula being sufficiently small to permit insertion of said cannula into the uterus of said woman without dilation of the cervix, inserting said cannula, on or about said date, through the undilated cervix of said woman, applying suction to said cannula and simultaneously moving the tip thereof to different positions within said uterus, and continuing said application of suction, and said movement, until substantially all of the menstrual fluid within said uterus has passed into said opening means and been withdrawn through said cannula, thereby eliminating the period of menstrual flow of said woman.
Claim 2
Independent Claim
144 words
A method of taking care of the menstrual requirements of a woman, which comprises: determining the date on which the normal menstrual flow of a woman is due to start or is actually starting, providing a semirigid cannula having opening means near the tip thereof, the outer diameter of said cannula being sufficiently small to permit insertion of said cannula into the uterus of said woman without dilation of the cervix, inserting said cannula, on or about said date, through the undilated cervix of said woman, applying suction to said cannula and simultaneously moving the tip thereof to different positions within said uterus, and continuing said application of suction, and said movement, until substantially all of the menstrual fluid within said uterus has passed into said opening means and been withdrawn through said cannula, thereby eliminating the period of menstrual flow of said woman.
Claim 3
Dependent Claim
53 words
The invention as claimed in claim 1, in which said method further comprises effecting a seal between the outer wall of said cannula and the interior wall of said cervix, whereby the suction applied within said uterus draws fluid therein only from the uterus, and also tends to effect contraction of said uterus.
Claim 4
Dependent Claim
48 words
The invention As claimed in claim 1, in which said cannula is initially inserted sufficiently far that said tip thereof is adjacent to the fundus, and in which said movement comprises first orbiting said tip near the fundus, and then slowly withdrawing said cannula while continuing said orbiting.
Claim 5
Dependent Claim
25 words
The invention as claimed in claim 1, in which said method further comprises causing said cannula to have an outer diameter of about 4 mm.
Claim 6
Dependent Claim
36 words
The invention as claimed in claim 1, in which said method further comprises applying said suction by connecting said cannula to a sealed receptacle, and removing air from said receptacle by means of a suction pump.
Claim 7
Dependent Claim
81 words
The invention as claimed in claim 5, in which said method further comprises employing as said suction pump a plastic syringe to which is connected a two-way check valve, said valve being so constructed and connected to said receptacle that movement of the plunger of said syringe in one direction expels air from said syringe to the ambient atmosphere but not to said receptacle, and movement of said plunger in the opposite direction draws air from said receptacle into said syringe.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |