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US2019652A
Expired / Lapsed
US
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Sky writing apparatus
Assignee: Individual
•
Filing: 1933-10-13
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Granted: 1935-11-05
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Expires: 1953-10-13
Abstract
No abstract record available.
Inventors
- 👤 Brookley Mary Joyce Fries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:54
CPC Classifications
F; F41; F41F; F41F3/00; F41F3/04; F41F3/06; F41A; F41A19/00; F41A19/58; F42; F42B; F42B4/00; F42B4/26; F42B4/28; F42B5/00; F42B5/02; F42B5/08; G; G09; G09F; G09F21/00; G09F21/06; G09F21/16
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) | 1938-11-04 | 1939-05-06 | 1939-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-04 | 1943-05-06 | 1943-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-04 | 1947-05-06 | 1947-11-05 | $7700.00 | Window Closed / Lapsed |