Patent US3489444A successfully refreshed from Google Patents.
US3489444A
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Spring loaded clamp and method of holding intersecting frame members
Assignee: Chevron USA Inc
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Filing: 1968-12-20
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Granted: 1970-01-13
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Expires: 1988-12-20
Abstract
No abstract record available.
Inventors
- 👤 Richard G Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:10
CPC Classifications
B; B25; B25B; B25B5/00; B25B5/06; Y; Y10; Y10T; Y10T24/00; Y10T24/34; Y10T24/3427; Y10T24/3439; Y10T24/344; Y10T24/3444; Y10T403/00; Y10T403/71; Y10T403/7194
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) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |