US3391757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scaffold
Assignee: CECO CORP
•
Filing: 1966-10-19
•
Granted: 1968-07-09
•
Expires: 1986-10-19
Abstract
No abstract record available.
Inventors
- 👤 Duke Paul
- 👤 James E Harpole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:04
CPC Classifications
E; E04; E04G; E04G3/00; E04G3/28; E04G3/34; E04G2003/283
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3124213A
Cited
GB606069A
Cited
FR974915A
Cited
US2730411A
Cited
US3011587A
Cited
US3059721A
Cited
US3135351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |