US3570181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hybrid alfalfa production
Assignee: L TEWELES SEED CO
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Filing: 1968-01-23
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Granted: 1971-03-16
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Expires: 1988-01-23
Abstract
Abstract SEED CAPABLE OF GROWING HYBRID ALFALFA IS EFFICIENTLY PRODUCED BY THE SELECTIVE HARVESTING OF THE SAME FROM A CYTOPLASMIC MALE STERILE ALFALFA SEED PARENT WHICH HAS BEEN CROSSED WITH POLLEN FROM A D MAINTAINER TYPE ALFALFA PLANT. THE D MAINTAINER TYPE PLANT UTILIZED IN THE PROCESS IS SELECTED SO AS TO CAUSE THE FORMATION OF SEED ON THE CYTOPLASMIC MALE STERILE SEED PARENT WHICH IS CAPABLE OF GROWING HYBRID MALE STERILE ALFALFA PLANTS TO THE SUBSTANTIALLY COMPLETE EXCLUSION OF OFF-TYPES. THE ALFALFA PLANTS GROWN FROM THE SEED MAY BE OPTIONALLY BACK-CROSSED WITH POLLEN FROM D MAINTAINER TYPE ALFALFA PLANTS.
Inventors
- 👤 William H Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:32
CPC Classifications
A; A01; A01H; A01H1/00; A01H1/02; A01H1/022; A01H1/023; Y; Y10; Y10S; Y10S47/00; Y10S47/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |