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US2481754A
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Assignee: Caterpillar Inc
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Filing: 1946-07-27
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Granted: 1949-09-13
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Expires: 1966-07-27
Abstract
No abstract record available.
Inventors
- 👤 Lloyd E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:49
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/04; F04B1/0404; F04B1/0413; F04B1/0408; F04B1/0426; F04B1/10; F04B1/107; F04B1/1071; F04B1/1072
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1000539A
Cited
GB137638A
Cited
US2173432A
Cited
US2147334A
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US2250947A
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US2271570A
Cited
US2427325A
Cited
US3457101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |