US2430616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instrument lens and dial
Assignee: Rohm and Haas Co
•
Filing: 1945-08-06
•
Granted: 1947-11-11
•
Expires: 1965-08-06
Abstract
No abstract record available.
Inventors
- 👤 Henry F Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
G; G04; G04B; G04B19/00; G04B19/06; G04B19/18; Y; Y10; Y10S; Y10S116/00; Y10S116/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190420008A
Cited
GB190911112A
Cited
FR816795A
Cited
US2173316A
Cited
US2159095A
Cited
US2223059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-10 | 1951-05-12 | 1951-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-10 | 1955-05-12 | 1955-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-10 | 1959-05-12 | 1959-11-11 | $7700.00 | Window Closed / Lapsed |