Patent US2515830A successfully refreshed from Google Patents.
US2515830A
Expired / Lapsed
US
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Apparatus for stretching sheet material
Assignee: American Optical Corp
•
Filing: 1946-10-19
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Granted: 1950-07-18
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Expires: 1966-10-19
Abstract
No abstract record available.
Inventors
- 👤 Mahler Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:33
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3033; B; B29; B29C; B29C55/00; B29C55/02; B29C55/04; B29C55/06; Y; Y10; Y10S; Y10S264/00; Y10S264/73
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US480199A
Cited
US546492A
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US2041138A
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US2078254A
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US2011553A
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US2287546A
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US2320375A
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US2328827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |