Patent US2893754A successfully refreshed from Google Patents.
US2893754A
Expired / Lapsed
US
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Special papers
Assignee: Individual
•
Filing: 1944-02-29
•
Granted: 1959-07-07
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Expires: 1964-02-29
Abstract
No abstract record available.
Inventors
- 👤 George A Richter
- 👤 Arthur B Lamb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:57
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/40; D21H21/44; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24736; Y10T428/24802
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US171871A
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US2240999A
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US2225520A
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US2235798A
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US2359185A
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US2322887A
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US2285490A
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US2300787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |