US3417520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dome structure and method of fabrication and erection
Assignee: GENERAL CONVEYOR Inc OF NORTHERN CALIFORNIA
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Filing: 1965-03-11
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Granted: 1968-12-24
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Expires: 1985-03-11
Abstract
No abstract record available.
Inventors
- 👤 Albert A Fink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:31
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/32; E04B1/3211; E04B2001/3235; E04B2001/3241
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) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |