US2909843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geometrical instrument
Assignee: JOHN E CASHMAN
•
Filing: 1957-11-25
•
Granted: 1959-10-27
•
Expires: 1977-11-25
Abstract
No abstract record available.
Inventors
- 👤 Bechtel John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:14
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1672751A
Cited
US1296886A
Cited
US1443088A
Cited
DE514707C
Cited
US2290585A
Cited
US2403633A
Cited
US2451931A
Cited
US2515954A
Cited
US2702944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |