Patent US2642638A successfully refreshed from Google Patents.
US2642638A
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Assignee: Individual
•
Filing: 1950-11-29
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Granted: 1953-06-23
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Expires: 1970-11-29
Abstract
No abstract record available.
Inventors
- 👤 Donald C Larrabee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:28
CPC Classifications
B; B42; B42F; B42F1/00; B42F1/02; B42F1/04; B42F1/08; Y; Y10; Y10T; Y10T24/00; Y10T24/20; Y10T24/202; Y10T24/205; Y10T24/34; Y10T24/3427; Y10T24/3459; Y10T24/46; Y10T24/468; Y10T24/4688; Y10T24/4689
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |