Patent US2673292A successfully refreshed from Google Patents.
Patent US3521913A successfully refreshed from Google Patents.
US3521913A
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US
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Assignee: GENE D VERHEIN
•
Filing: 1968-08-26
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Granted: 1970-07-28
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Expires: 1988-08-26
Abstract
No abstract record available.
Inventors
- 👤 Donald Verhein
- 👤 Gene D Verhein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:39
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/06; F16L21/00; F16L21/002; F16L21/005; Y; Y10; Y10T; Y10T403/00; Y10T403/57; Y10T403/5733
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2416657A
Cited
US2470359A
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GB627278A
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US2726103A
Cited
US2871034A
Cited
DE1151990B
Cited
US3235291A
Cited
US3269754A
Cited
US3360283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |