US2521915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1943-09-08
•
Granted: 1950-09-12
•
Expires: 1963-09-08
Abstract
No abstract record available.
Inventors
- 👤 Henry E Hartig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:21
CPC Classifications
G; G06; G06G; G06G1/00; G06G1/0005; G06G1/0057
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB389910A
Cited
US1397944A
Cited
US1435422A
Cited
DE428216C
Cited
GB292223A
Cited
US1954723A
Cited
US2388582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |