Patent US3115819A successfully refreshed from Google Patents.
US2499322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic aperture controlling device
Assignee: ExxonMobil Oil Corp
•
Filing: 1948-05-08
•
Granted: 1950-02-28
•
Expires: 1968-05-08
Abstract
No abstract record available.
Inventors
- 👤 John C Mather
- 👤 Shenton Francis George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:27
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/04; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1558; Y10T74/1565; Y10T74/1576
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |