Patent US2962621A successfully refreshed from Google Patents.
US3521072A
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Variable masking of radiation sensitive areas along x and y axes by pivotally mounted control shaft
Assignee: JAIRUS D HALL
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Filing: 1967-08-21
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Granted: 1970-07-21
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Expires: 1987-08-21
Abstract
No abstract record available.
Inventors
- 👤 James W Wipson
- 👤 Jairus D Hall
- 👤 Richard M Bickford
- 👤 Stuart B Wahlberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:45
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G05; G05G; G05G9/00; G05G9/02; G05G9/04; G05G9/047; G05G2009/0474; G05G2009/04759
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US884501A
Cited
US2447344A
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US3128387A
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US3164838A
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US3254225A
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US3365639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |