US2491816A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1948-09-09
•
Granted: 1949-12-20
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Expires: 1968-09-09
Abstract
No abstract record available.
Inventors
- 👤 Keeton Hollis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:00
CPC Classifications
B; B42; B42D; B42D9/00; B42D9/008; Y; Y10; Y10S; Y10S83/00; Y10S83/917; Y10T; Y10T225/00; Y10T225/20; Y10T225/224; Y10T225/226; Y10T225/228; Y10T225/229
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |