Patent US3419970A successfully refreshed from Google Patents.
US3419970A
Expired / Lapsed
US
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Model structural system
Assignee: ENGINEERING MODEL ASSOCIATES
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Filing: 1966-02-21
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Granted: 1969-01-07
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Expires: 1986-02-21
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Wanderman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:06
CPC Classifications
G; G09; G09B; G09B25/00; G09B25/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190903291A
Cited
US1201579A
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US1426087A
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US1668551A
Cited
US2146332A
Cited
GB447801A
Cited
FR74205E
Cited
US3168793A
Cited
US3303581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |