US3536371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for producing and utilizing arrays of diffraction type lenses for micro-electronics mask making
Assignee: Individual
•
Filing: 1967-07-20
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Granted: 1970-10-27
•
Expires: 1987-07-20
Abstract
No abstract record available.
Inventors
- 👤 Daniel Post
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:31
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/32; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3405614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |