Patent US1916567A successfully refreshed from Google Patents.
US1916567A
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US
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Apparatus for producing light boundaries
Assignee: Individual
•
Filing: 1929-04-01
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Granted: 1933-07-04
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Expires: 1949-04-01
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:33
CPC Classifications
B; B27; B27B; B27B31/00; B27B31/06; G; G02; G02B; G02B21/00; G02B21/0004; G02B21/0016; Y; Y10; Y10S; Y10S116/00; Y10S116/39
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) | 1936-07-03 | 1937-01-02 | 1937-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-07-03 | 1941-01-02 | 1941-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-07-03 | 1945-01-02 | 1945-07-04 | $7700.00 | Window Closed / Lapsed |