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US2621387A
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Assignee: Individual
•
Filing: 1946-02-01
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Granted: 1952-12-16
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Expires: 1966-02-01
Abstract
No abstract record available.
Inventors
- 👤 Harvey L Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:19
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/24; A44B19/26; A44B19/30; A44B19/301; Y; Y10; Y10T; Y10T24/00; Y10T24/25; Y10T24/2509; Y10T24/2511
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US613388A
Cited
US2174160A
Cited
FR552374A
Cited
US1819449A
Cited
US2190608A
Cited
US2261131A
Cited
US2398947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |