Patent US2835933A successfully refreshed from Google Patents.
US2835933A
Expired / Lapsed
US
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Door frame
Assignee: KEWANEE Manufacturing CO
•
Filing: 1955-01-21
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Granted: 1958-05-27
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Expires: 1975-01-21
Abstract
No abstract record available.
Inventors
- 👤 Rupert L Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:34
CPC Classifications
E; E06; E06B; E06B1/00; E06B1/56; E06B1/60; E06B1/6069; E06B1/6076; E06B1/04; E06B1/52; E06B3/00; E06B3/96; E06B3/988; E06B3/9885
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1063517A
Cited
US1606780A
Cited
US1718813A
Cited
US1750921A
Cited
US2598139A
Cited
US2730773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |