Patent US3365524A successfully refreshed from Google Patents.
US3365524A
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US
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Method for making and testing a mold for a backlit projection screen
Assignee: Fma Inc
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Filing: 1966-04-14
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Granted: 1968-01-23
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Expires: 1986-04-14
Abstract
No abstract record available.
Inventors
- 👤 James S Thompson
- 👤 Poul B Roulund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:24
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/38; B29C33/3842; B29C33/3857; B29C33/3892; B29C37/00; B29C37/0053; B29C70/00; B29C70/58; B29C70/64; B29D; B29D11/00; B29D11/00605; B29D11/00615; G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; G03B21/625; B29L; B29L2011/00; B29L2011/0016; B29L2011/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2143946A
Cited
US2218909A
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US2332674A
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US2378252A
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US3198670A
Cited
US3164645A
Cited
US3187068A
Cited
US3218186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |