Patent US3472272A successfully refreshed from Google Patents.
US3472272A
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US
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Assignee: Erie Technological Products Inc
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Filing: 1966-11-21
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Granted: 1969-10-14
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Expires: 1986-11-21
Abstract
No abstract record available.
Inventors
- 👤 John P Bertics
- 👤 Robert L Royall Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:11
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/32; E04G21/3204; E04G21/3223; E04F; E04F11/00; E04F11/18; E04H; E04H17/00; E04H17/006; E04H17/017; F; F16; F16L; F16L1/00; F16L3/00; F16L9/00; F16L9/003; E04F2011/1868; E04F2011/1878; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6966
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB336414A
Cited
US2578280A
Cited
US2940466A
Cited
US3195698A
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US3194361A
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US3264791A
Cited
US3295833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |