US3477848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing sets of photomask having accurate registration
Assignee: Texas Instruments Inc
•
Filing: 1964-12-14
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Granted: 1969-11-11
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Expires: 1984-12-14
Abstract
No abstract record available.
Inventors
- 👤 John P Pritchard Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:19
CPC Classifications
H; H10; H10D; H10D99/00; C; C23; C23F; C23F1/00; C23F1/02; G; G03; G03F; G03F7/00; G03F7/70; G03F7/70425; G03F7/70433; G11; G11C; G11C15/00; G11C15/06; H10N; H10N60/00; H10N60/01; H10N97/00; H10P; H10P95/00
Claims Analysis
Total Claims: 0
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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) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |