Patent US3492072A successfully refreshed from Google Patents.
US3492072A
Expired / Lapsed
US
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Apparatus for producing radiation patterns for forming etchant-resistant patterns and the like
Assignee: Westinghouse Electric Corp
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Filing: 1965-04-14
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Granted: 1970-01-27
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Expires: 1985-04-14
Abstract
No abstract record available.
Inventors
- 👤 Robert D Haun Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:41
CPC Classifications
H; H10; H10P; H10P76/00; H10P76/20; H10P76/204; H10P76/2041; B; B23; B23K; B23K26/00; B23K26/02; B23K26/06; B23K26/073; H10P95/00; Y; Y10; Y10S; Y10S430/00; Y10S430/146
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) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |