US2473255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing modified protein
Assignee: Wyeth Holdings LLC
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Filing: 1946-01-15
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Granted: 1949-06-14
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Expires: 1966-01-15
Abstract
No abstract record available.
Inventors
- 👤 Ivan A Parfentjev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:41
CPC Classifications
A; A23; A23J; A23J3/00; A23J3/30; A23J3/32; A23J3/34; A23J3/341; A23J3/343; A23J3/344
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |