US2664181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow metal door construction
Assignee: Individual
•
Filing: 1948-05-13
•
Granted: 1953-12-29
•
Expires: 1968-05-13
Abstract
No abstract record available.
Inventors
- 👤 Boughton Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:56
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/70; E06B3/82; E06B3/827; E06B2003/7046; Y; Y10; Y10T; Y10T292/00; Y10T292/62; Y10T70/00; Y10T70/80; Y10T70/8432; Y10T70/8459; Y10T70/8541
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1323753A
Cited
USRE21024E
Cited
US963450A
Cited
US1039292A
Cited
US1822251A
Cited
US1748195A
Cited
GB376814A
Cited
US2013412A
Cited
GB471258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |