Patent US3380205A successfully refreshed from Google Patents.
US3380205A
Expired / Lapsed
US
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Foundations for trailer type homes
Assignee: Ratchford Tool Corp
•
Filing: 1965-05-07
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Granted: 1968-04-30
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Expires: 1985-05-07
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Ratchford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:57
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/0007; E04B1/38; E04B1/58; E04B1/5806; E04B1/5812; Y; Y10; Y10T; Y10T403/00; Y10T403/71; Y10T403/7194
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE816753C
Cited
US2722040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |