US1542030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control method and apparatus
Assignee: Leeds and Northrup Co
•
Filing: 1921-04-25
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Granted: 1925-06-16
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Expires: 1941-04-25
Abstract
No abstract record available.
Inventors
- 👤 Edward S Bristol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:00
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/37; G01F1/372; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0357; Y10T137/0368; Y10T137/0753; Y10T137/0923; Y10T137/0947; Y10T137/2278; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2559; Y10T137/265; Y10T137/2657; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7781; Y10T137/7782; Y10T137/7784; Y10T137/7787; Y10T137/7789; Y10T137/8158; Y10T137/8326; Y10T137/8593; Y10T137/877
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-06-15 | 1928-12-15 | 1929-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-06-15 | 1932-12-15 | 1933-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-06-15 | 1936-12-15 | 1937-06-16 | $7700.00 | Window Closed / Lapsed |