US2810960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision engraving instrument
Assignee: Individual
•
Filing: 1956-07-06
•
Granted: 1957-10-29
•
Expires: 1976-07-06
Abstract
No abstract record available.
Inventors
- 👤 Quentin S Johnson
- 👤 William H Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:34
CPC Classifications
B; B44; B44B; B44B3/00; B44B3/06; B44B3/061
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2734272A
Cited
US611625A
Cited
US2735177A
Cited
US939597A
Cited
US1276793A
Cited
US1649966A
Cited
US1707914A
Cited
US2413274A
Cited
US2311234A
Cited
US2567049A
Cited
US2497418A
Cited
US2744329A
Cited
US2748474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |