US2579581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leader film
Assignee: Individual
•
Filing: 1947-12-26
•
Granted: 1951-12-25
•
Expires: 1967-12-26
Abstract
No abstract record available.
Inventors
- 👤 Hugo R Hustad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:55
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1450795A
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US1065135A
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US1383745A
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US1596808A
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US1598445A
Cited
US1663738A
Cited
US1655297A
Cited
FR738412A
Cited
FR855178A
Cited
US2207657A
Cited
US2253874A
Cited
US2438063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |