Patent US2406401A successfully refreshed from Google Patents.
US2406401A
Expired / Lapsed
US
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Mold for use in the manufacture of optical elements
Assignee: Polaroid Corp
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Filing: 1942-09-02
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Granted: 1946-08-27
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Expires: 1962-09-02
Abstract
No abstract record available.
Inventors
- 👤 John H Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:25
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/0074; Y; Y10; Y10S; Y10S29/00; Y10S29/034
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-08-26 | 1950-02-25 | 1950-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-08-26 | 1954-02-25 | 1954-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-08-26 | 1958-02-25 | 1958-08-27 | $7700.00 | Window Closed / Lapsed |