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Patent US3472735A successfully refreshed from Google Patents.
US3472735A
Expired / Lapsed
US
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Preservation of semen
Assignee: Takeda Pharmaceutical Co Ltd
•
Filing: 1967-04-25
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Granted: 1969-10-14
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Expires: 1987-04-25
Abstract
No abstract record available.
Inventors
- 👤 Yoshimasa Nishikawa
- 👤 Toshio Hayami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:03
CPC Classifications
A; A61; A61K; A61K35/00; A61K35/12; A61K35/48; A61K35/52; A01; A01N; A01N1/00; A01N1/10; A01N1/12; A01N1/122; A01N1/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3016380A
Cited
US3109000A
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US2598881A
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US3005756A
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US3064000A
Cited
US3185623A
Cited
US3306818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |