Patent US1487747A successfully refreshed from Google Patents.
US1487747A
Expired / Lapsed
US
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Motion-picture screen
Assignee: Individual
•
Filing: 1921-09-12
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Granted: 1924-03-25
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Expires: 1941-09-12
Abstract
No abstract record available.
Inventors
- 👤 Waldemar H C Lassen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:03
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24421; Y10T428/31504; Y10T428/31801; Y10T428/31844; Y10T428/31848; Y10T428/31851; Y10T442/00; Y10T442/20; Y10T442/2369; Y10T442/60; Y10T442/699
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) | 1927-03-25 | 1927-09-24 | 1928-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-03-25 | 1931-09-24 | 1932-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-03-25 | 1935-09-24 | 1936-03-25 | $7700.00 | Window Closed / Lapsed |