US2798409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety support for spectacles
Assignee: Individual
•
Filing: 1954-05-18
•
Granted: 1957-07-09
•
Expires: 1974-05-18
Abstract
No abstract record available.
Inventors
- 👤 Speers Reginald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:52
CPC Classifications
G; G02; G02C; G02C3/00; G02C3/006; Y; Y10; Y10T; Y10T24/00; Y10T24/13; Y10T24/1371; Y10T24/1397; Y10T24/44; Y10T24/44641; Y10T24/44932
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US924633A
Cited
US2249572A
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US2023523A
Cited
US2317873A
Cited
US2499140A
Cited
US2550348A
Cited
US2649255A
Cited
US2649020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |