Patent US2633398A successfully refreshed from Google Patents.
US2633398A
Expired / Lapsed
US
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Efficiency desk
Assignee: Individual
•
Filing: 1949-02-07
•
Granted: 1953-03-31
•
Expires: 1969-02-07
Abstract
No abstract record available.
Inventors
- 👤 Mcallister Austin Rayn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:50
CPC Classifications
A; A47; A47B; A47B83/00; A47B83/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US939125A
Cited
US1232649A
Cited
US1595263A
Cited
US2171084A
Cited
US2220475A
Cited
US2446491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |