Patent US3487972A successfully refreshed from Google Patents.
US3487972A
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Assignee: Dart Industries Inc
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Filing: 1968-12-27
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Granted: 1970-01-06
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Expires: 1988-12-27
Abstract
No abstract record available.
Inventors
- 👤 James B Swett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:43
CPC Classifications
B; B65; B65D; B65D43/00; B65D43/02; B65D43/0202; B65D43/0214; B65D43/0218; B65D1/00; B65D1/34; B65D1/36; B65D2543/00; B65D2543/00009; B65D2543/00018; B65D2543/00064; B65D2543/00074; B65D2543/00101; B65D2543/00259; B65D2543/00296; B65D2543/00444; B65D2543/00481; B65D2543/0049; B65D2543/00509; B65D2543/00537; B65D2543/00555; B65D2543/00824; B65D2543/00833; B65D2543/00842
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2731996A
Cited
US2641912A
Cited
US2789608A
Cited
US3079028A
Cited
FR1315114A
Cited
US3189185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |