Patent US4774039A successfully refreshed from Google Patents.
US3523701A
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Assignee: GRA TEC Inc
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Filing: 1967-11-24
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Granted: 1970-08-11
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Expires: 1987-11-24
Abstract
No abstract record available.
Inventors
- 👤 Charles H Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:08
CPC Classifications
F; F16; F16B; F16B21/00; F16B21/10; F16B21/16; F16B21/18; F16B2/00; F16B2/20; F16B2/22; F16B2/24; F16B2/248; F16L; F16L37/00; F16L37/08; F16L37/084; F16L37/088; F16L37/0885; Y; Y10; Y10T; Y10T403/00; Y10T403/59
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) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |