USRE28536E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Animal husbandry
Assignee: —
•
Filing: 1971-03-04
•
Granted: 1975-09-02
•
Expires: 1991-03-04
Abstract
Abstract The present invention involves an estrus block and enhancement method which predetermines when domestic animals such as cows, (sheep, ) horses, etc., go into estrum. A medicament implant surgically inserted in the domestic animal slowly releases a medicament whose pharmacological action blocks occurrence of estrus, the total dosage available in the medicament implant being in excess of what will be absorbed over the residence period i.e., 14-18 days. Surgical removal of the implant after a predetermined period, i.e., from 14-18 days abruptly halts medication. A rebound phenomena enhances estrus and onset of estrum occurs in from 2-7 days following removal of the implant. By treating a group of cows in this fashion, onset of estrum for the entire group is synchronized and all may be artifically inseminated during the 2-7 days post removal period.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:04
CPC Classifications
A; A61; A61D; A61D19/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
An estrus block and enhancement technique which comprises: (i) (surgically) subcutaneously inserting into a female domestic animal selected from the group consisting of cattle, horses and pigs an implant of a medicament whose pharmacologic action blocks occurrence of estrus, (ii) permitting the implant to remain in the animal and continuously release medicament for about 14-18 days, said implant being adapted to release medicament continuously for at least 18 days, and (iii) surgically removing said implant at the expiration of said 14-18-day waiting period, thereby halting medication, whereby a rebound phenomenon enhances estrus and onset of estrum occurs in from 2-7 days following removal of said implant.
Claim 2
Dependent Claim
106 words
An estrus block and enhancement technique which comprises: (i) (surgically) subcutaneously inserting into a female domestic animal selected from the group consisting of cattle, horses and pigs an implant of a medicament whose pharmacologic action blocks occurrence of estrus, (ii) permitting the implant to remain in the animal and continuously release medicament for about 14-18 days, said implant being adapted to release medicament continuously for at least 18 days, and (iii) surgically removing said implant at the expiration of said 14-18-day waiting period, thereby halting medication, whereby a rebound phenomenon enhances estrus and onset of estrum occurs in from 2-7 days following removal of said implant.
Claim 3
Dependent Claim
33 words
The method of claim 1 wherein multiple numbers of female animals are implanted at one time and implants are removed at one time and synchronized estrus in the so treated group is attained.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein the female animal is artificially inseminated daily during said 2-7-day period.
Claim 5
Dependent Claim
36 words
The method of claim 1 wherein a plurality of cows and heifers are implanted at one time and the implants removed at one time, whereby estrus of the group is synchronized to within a 2-7-day period.
Claim 6
Dependent Claim
18 words
The method of claim 4 wherein said cows and heifers are artificially inseminated daily during said 2-7-day period.
Claim 7
Dependent Claim
23 words
The method of claim 4 wherein said cows and heifers are artificially inseminated daily for the 3rd, 4th, 5th post implant removal days.
Claim 8
Dependent Claim
61 words
A depot adapted for subcutaneous implant purposes comprising an estrus blocking medicament compounded with inert diluent and formulated into a multilayer pellet, with said medicament being present only in the outermost layer portions of said pellet and at least one core layer containing only a non-dissolving inert diluent, said core layer being substantially larger than the medicament containing outermost layer portions.
Claim 9
Dependent Claim
61 words
A depot adapted for subcutaneous implant purposes comprising an estrus blocking medicament compounded with inert diluent and formulated into a multilayer pellet, with said medicament being present only in the outermost layer portions of said pellet and at least one core layer containing only a non-dissolving inert diluent, said core layer being substantially larger than the medicament containing outermost layer portions.
References Cited (Backward Citations)
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Cited
GB722629A
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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |