Patent US2497429A successfully refreshed from Google Patents.
US2497429A
Expired / Lapsed
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Multiple film hanger with film tensioning means
Assignee: Pako Corp
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Filing: 1945-09-15
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Granted: 1950-02-14
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Expires: 1965-09-15
Abstract
No abstract record available.
Inventors
- 👤 Robert W Armstrong
- 👤 Sardeson Robert
- 👤 Edward H Savela
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:54
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/02; G03D13/08; G03D13/12; G03D13/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1113288A
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US1237563A
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GB207952A
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US1778140A
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US1666895A
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US1825310A
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US1854931A
Cited
DE568057C
Cited
US2078078A
Cited
US2180010A
Cited
US2290831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |