Patent US2652907A successfully refreshed from Google Patents.
US2652907A
Expired / Lapsed
US
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Knockdown reversible hollow metal doorframe
Assignee: FIRECRAFT Corp
•
Filing: 1947-04-12
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Granted: 1953-09-22
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Expires: 1967-04-12
Abstract
No abstract record available.
Inventors
- 👤 Karl B Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:48
CPC Classifications
E; E06; E06B; E06B1/00; E06B1/04; E06B1/52; E06B1/56; E06B1/60; E06B1/6015; E06B1/6038; E06B1/6092; E06B3/00; E06B3/96; E06B3/988; E06B3/9885; Y; Y10; Y10T; Y10T292/00; Y10T292/68; Y10T292/705
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |