US2858451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminar ray shielding materials
Assignee: Individual
•
Filing: 1955-03-07
•
Granted: 1958-10-28
•
Expires: 1975-03-07
Abstract
No abstract record available.
Inventors
- 👤 Herman I Silversher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:55
CPC Classifications
G; G21; G21F; G21F7/00; G21F7/02; G21F7/03; G21F1/00; G21F1/02; G21F1/10; G21F1/103; G21F1/106; G21F1/12; G21F1/125; Y; Y10; Y10S; Y10S60/00; Y10S60/909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1854942A
Cited
US2136180A
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US2354081A
Cited
US2366168A
Cited
US2499134A
Cited
US2679468A
Cited
US2682515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |