Patent US3701448A successfully refreshed from Google Patents.
Patent US2598355A successfully refreshed from Google Patents.
US2598355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pendulum compensated surveying instrument
Assignee: NORTH AMERICAN GEOPHYSICAL CO
•
Filing: 1946-09-13
•
Granted: 1952-05-27
•
Expires: 1966-09-13
Abstract
No abstract record available.
Inventors
- 👤 Raymond T Cloud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:55
CPC Classifications
G; G01; G01C; G01C7/00; G01C7/02; G01C7/04; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229; Y10T74/1232; Y10T74/125
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE530761C
Cited
US624268A
Cited
US95758A
Cited
US681835A
Cited
US1100698A
Cited
US1571820A
Cited
US1542809A
Cited
US1567347A
Cited
GB230186A
Cited
GB404303A
Cited
US2224954A
Cited
US2176807A
Cited
US2320290A
Cited
US2381225A
Cited
US2362616A
Cited
US2429620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |