US2505146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for stretching continuous sheet materials
Assignee: Polaroid Corp
•
Filing: 1946-12-14
•
Granted: 1950-04-25
•
Expires: 1966-12-14
Abstract
No abstract record available.
Inventors
- 👤 William H Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:24
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/04; B29C55/045; Y; Y10; Y10S; Y10S425/00; Y10S425/053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US469256A
Cited
US1784758A
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US2067025A
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US2305470A
Cited
US2335190A
Cited
US2412187A
Cited
US2448433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |