US3500135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface-contoured,energy-transforming solid-state device
Assignee: CHOU H LI
•
Filing: 1969-02-25
•
Granted: 1970-03-10
•
Expires: 1989-02-25
Abstract
No abstract record available.
Inventors
- 👤 Chou H Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:23
CPC Classifications
H; H10; H10F; H10F99/00; C; C30; C30B; C30B21/00; C30B21/02; C30B21/04; H10D; H10D62/00; H10D62/10; H10D62/102; H10D62/103; H10D62/104; H10D62/117; H10D99/00; H10F39/00; H10F39/10; H10F39/107; H10H; H10H20/00; H10H20/80; H10W; H10W10/00; H10W10/01; H10W10/021; H10W10/041; H10W10/20; H10W10/40; Y; Y10; Y10S; Y10S136/00; Y10S136/29; Y10S148/00; Y10S148/085; Y10S148/117
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |