US3473261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Revolving door assembly quick disconnect connector
Assignee: International Steel Co
•
Filing: 1968-08-19
•
Granted: 1969-10-21
•
Expires: 1988-08-19
Abstract
No abstract record available.
Inventors
- 👤 Amuel Sheckells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:52
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/90; E05; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10S; Y10S464/00; Y10S464/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1514851A
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US3364620A
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US3372604A
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US3403571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |