US2633639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surveying instrument
Assignee: Individual
•
Filing: 1945-10-30
•
Granted: 1953-04-07
•
Expires: 1965-10-30
Abstract
No abstract record available.
Inventors
- 👤 Suverkrop Lew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:45
CPC Classifications
G; G01; G01C; G01C17/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US446956A
Cited
US211968A
Cited
US264061A
Cited
US286606A
Cited
US297164A
Cited
US413118A
Cited
US470076A
Cited
US1307637A
Cited
US234332A
Cited
US503164A
Cited
US533465A
Cited
US1313732A
Cited
US453160A
Cited
US774515A
Cited
US814292A
Cited
US839511A
Cited
GB190726329A
Cited
US994903A
Cited
US955911A
Cited
US1068159A
Cited
US1036096A
Cited
US1105149A
Cited
FR490951A
Cited
US1181992A
Cited
US1209107A
Cited
US1474394A
Cited
US1412442A
Cited
US1496390A
Cited
US1439218A
Cited
US1445922A
Cited
US1502804A
Cited
FR576370A
Cited
GB241792A
Cited
US1665002A
Cited
US1909135A
Cited
US1799648A
Cited
US1969697A
Cited
US1897282A
Cited
US1973716A
Cited
US1972708A
Cited
US2022516A
Cited
US2003179A
Cited
US2008475A
Cited
US2127878A
Cited
US2060766A
Cited
US2111829A
Cited
US2107124A
Cited
US2231036A
Cited
US2305233A
Cited
US2399909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |