US2820516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door construction
Assignee: Cookson Co
•
Filing: 1953-05-15
•
Granted: 1958-01-21
•
Expires: 1973-05-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Harold W Cookson
- 👤 Jr Edward H Forestier
- 👤 Wardlaw Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:52
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/56; E06B9/58; E06B9/582
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1869347A
Cited
US1948769A
Cited
US2006228A
Cited
US2064470A
Cited
US1948770A
Cited
US2189020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |