US2937554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nathan
Assignee: —
•
Filing: —
•
Granted: 1960-05-24
•
Expires: 1977-05-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:22
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; Y; Y10; Y10T; Y10T83/00; Y10T83/444; Y10T83/4443; Y10T83/4539; Y10T83/4541; Y10T83/4544; Y10T83/869; Y10T83/8776; Y10T83/8782; Y10T83/8784; Y10T83/8788
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US308705A
Cited
US2712442A
Cited
US2806693A
Cited
US1055966A
Cited
US1746192A
Cited
US1996665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |