US2423663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film cartridge
Assignee: GAF Chemicals Corp
•
Filing: 1944-09-22
•
Granted: 1947-07-08
•
Expires: 1964-09-22
Abstract
No abstract record available.
Inventors
- 👤 Bruno C Roehrl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:30
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/28; G03B17/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US870445A
Cited
US1353016A
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US1686204A
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US1987247A
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US2019672A
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US2153573A
Cited
DE703087C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-07 | 1951-01-06 | 1951-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-07 | 1955-01-06 | 1955-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-07 | 1959-01-06 | 1959-07-08 | $7700.00 | Window Closed / Lapsed |