US2420724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of depositing films of material
Assignee: Bausch and Lomb Inc
•
Filing: 1944-09-21
•
Granted: 1947-05-20
•
Expires: 1964-09-21
Abstract
No abstract record available.
Inventors
- 👤 Richard M Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:12
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/02; C23C14/021; C23C14/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1965587A
Cited
US2067907A
Cited
US2103623A
Cited
US2157478A
Cited
US2164595A
Cited
US2322613A
Cited
GB510404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |