US2432688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for forming separating films on dental stone
Assignee: R D Justi & Son Inc
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Filing: 1944-02-02
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Granted: 1947-12-16
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Expires: 1964-02-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Fred A Slack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:39
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/20; C; C08; C08L; C08L3/00; C08L3/02
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) | 1950-12-15 | 1951-06-16 | 1951-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-15 | 1955-06-16 | 1955-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-15 | 1959-06-16 | 1959-12-16 | $7700.00 | Window Closed / Lapsed |