US1900348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: National Carbon Co Inc
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Filing: 1930-07-03
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Granted: 1933-03-07
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Expires: 1950-07-03
Abstract
No abstract record available.
Inventors
- 👤 Homer W Jones
- 👤 Herman G Graubner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:37
CPC Classifications
F; F21; F21L; F21L4/00; F21V; F21V23/00; F21V23/04; F21V23/0414
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) | 1936-03-06 | 1936-09-05 | 1937-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-03-06 | 1940-09-05 | 1941-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-03-06 | 1944-09-05 | 1945-03-07 | $7700.00 | Window Closed / Lapsed |