US2818661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic door and conveying system
Assignee: Akzo Nobel UK PLC
•
Filing: 1953-11-06
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Granted: 1958-01-07
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Expires: 1973-11-06
Abstract
No abstract record available.
Inventors
- 👤 Sterling W Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:56
CPC Classifications
F; F26; F26B; F26B25/00; F26B25/06; F26B25/08; F26B25/12; D; D21; D21F; D21F5/00; D21G; D21G9/00; D21G9/0063; F26B13/00; F26B13/005; F26B13/10; F26B13/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US952829A
Cited
US992492A
Cited
US1050677A
Cited
US1492485A
Cited
US1667737A
Cited
GB298395A
Cited
GB334952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |