US2633996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary shelf
Assignee: Individual
•
Filing: 1949-10-31
•
Granted: 1953-04-07
•
Expires: 1969-10-31
Abstract
No abstract record available.
Inventors
- 👤 Philip F Litchfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:13
CPC Classifications
A; A47; A47B; A47B96/00; A47B96/02; A47B96/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1270718A
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US1331621A
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US1792186A
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US1864907A
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US1857522A
Cited
US2003244A
Cited
US2090176A
Cited
GB475139A
Cited
US2197870A
Cited
US2444584A
Cited
US2472058A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |