US2474306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulosic products
Assignee: Parke Davis and Co LLC
•
Filing: 1945-02-23
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Granted: 1949-06-28
•
Expires: 1965-02-23
Abstract
No abstract record available.
Inventors
- 👤 Doub Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:06
CPC Classifications
D; D06; D06M; D06M16/00; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; C; C08; C08B; C08B15/00; C08B15/02; D06M11/00; D06M11/58; D06M11/64; D06M13/00; D06M13/322; D06M13/46; D06M13/463
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) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |