US3533919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of superconductors
Assignee: National Research Development Corp UK
•
Filing: 1968-11-29
•
Granted: 1970-10-13
•
Expires: 1988-11-29
Abstract
No abstract record available.
Inventors
- 👤 Prior Arthur Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:25
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/32; C23C14/06; C23C14/14; C23C14/16; C23C14/28; C23C14/30; C25; C25D; C25D5/00; C25D5/34; C25D5/38; Y; Y10; Y10S; Y10S505/00; Y10S505/80; Y10S505/815; Y10S505/816
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2993266A
Cited
US3021271A
Cited
US3178308A
Cited
US3253331A
Cited
US3346467A
Cited
US3305473A
Cited
US3443304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |