US3625418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for determining female fertility periods
Assignee: Commonwealth of Puerto Rico
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Filing: 1969-11-03
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Granted: 1971-12-07
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Expires: 1989-11-03
Abstract
Abstract A two-part slide rule type device having in one part and on one line successive days of each two successive months throughout the year, the other part being divided into sections of greatest and less fertility. The second part is superimposed on the first with its beginning at the date of the first day of menstruation, and the divisions of the second part then indicate the dates of the periods of greatest and less fertility.
Inventors
- 👤 Ernesto F Colon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:02
CPC Classifications
G; G06; G06C; G06C3/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
233 words
A device for indicating the varying periods of female fertility, comprising a first planar part having printed thereon a vertical arrangement of horizontal rows each of which comprises two sequential parts, the first part of each row enumerating the successive days of one of the months of the year anD the successive rows showing the months of the year in sequence from Jan. to Dec., the second part of each of the successive rows showing the days of the month which follows the month the days of which are enumerated in the first part of the row, whereby each row consists of the enumerated days of a month of the year and the days of the succeeding month, and a second planar part of the device which is detachably connected to the first part and is adapted and intended to be detached therefrom for use therewith, the second part having printed thereon an elongated scale to be superimposed on any one of the month rows of the first part, the scale comprising two successive identical sections each of which is equal in length to any 28-day interval of any row of the first section of the device, each section of the scale being divided into a first part and a second part which are equal, respectively, to any 8-day and any 20-day interval of any row of the first part of the device.
Claim 2
Independent Claim
233 words
A device for indicating the varying periods of female fertility, comprising a first planar part having printed thereon a vertical arrangement of horizontal rows each of which comprises two sequential parts, the first part of each row enumerating the successive days of one of the months of the year anD the successive rows showing the months of the year in sequence from Jan. to Dec., the second part of each of the successive rows showing the days of the month which follows the month the days of which are enumerated in the first part of the row, whereby each row consists of the enumerated days of a month of the year and the days of the succeeding month, and a second planar part of the device which is detachably connected to the first part and is adapted and intended to be detached therefrom for use therewith, the second part having printed thereon an elongated scale to be superimposed on any one of the month rows of the first part, the scale comprising two successive identical sections each of which is equal in length to any 28-day interval of any row of the first section of the device, each section of the scale being divided into a first part and a second part which are equal, respectively, to any 8-day and any 20-day interval of any row of the first part of the device.
Claim 3
Dependent Claim
56 words
A device according to claim 1, in which each section of the scale comprises a continuous line of which the 8-day part is horizontal and indicates the period of least fertility, and the 20-day part follows the 8-day part and has ascending and descending parts of equal length to indicate periods of increasing and decreasing fertility.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |