US2714253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perspective drafting machine
Assignee: Individual
•
Filing: 1952-03-31
•
Granted: 1955-08-02
•
Expires: 1972-03-31
Abstract
No abstract record available.
Inventors
- 👤 Irving S Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:11
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US430647A
Cited
GB189822740A
Cited
US795065A
Cited
US1072439A
Cited
CH84778A
Cited
US1502277A
Cited
US1807237A
Cited
US2442117A
Cited
US2519812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-01 | 1959-01-31 | 1959-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-01 | 1963-01-31 | 1963-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-01 | 1967-01-31 | 1967-08-02 | $7700.00 | Window Closed / Lapsed |