Patent US3516771A successfully refreshed from Google Patents.
US3516771A
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US
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Assignee: HP Inc
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Filing: 1968-08-01
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Granted: 1970-06-23
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Expires: 1988-08-01
Abstract
No abstract record available.
Inventors
- 👤 John F Rendina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:23
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/71; G01N21/72; F; F23; F23D; F23D99/00; F23D99/002; F23D99/004; F23D2206/00; F23D2206/0094
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB367747A
Cited
GB140576A
Cited
US730079A
Cited
US738433A
Cited
US1381144A
Cited
US1441982A
Cited
US1785804A
Cited
US2714833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |