Patent US2948954A successfully refreshed from Google Patents.
US2948954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Small sized helixes and method of their fabrication
Assignee: Individual
•
Filing: 1956-03-08
•
Granted: 1960-08-16
•
Expires: 1976-03-08
Abstract
No abstract record available.
Inventors
- 👤 Alexander P Ramsa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:18
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/26; H01J19/00; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0019; H01J2893/0022; H01J2893/0025; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49995; Y10T29/49996
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US201420A
Cited
US879545A
Cited
US1582683A
Cited
US1640472A
Cited
US2435242A
Cited
US2652623A
Cited
US2758241A
Cited
US2685019A
Cited
US2752523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |