US3397499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support system for a ceiling
Assignee: INLAND STEEL PRODUCTS CO
•
Filing: 1965-03-17
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Granted: 1968-08-20
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Expires: 1985-03-17
Abstract
No abstract record available.
Inventors
- 👤 John R Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:35
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/072; E; E04; E04B; E04B9/00; E04B9/02; E04B9/06; E04B9/12; E04B9/14; E04B9/32
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) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |