Patent US3148956A successfully refreshed from Google Patents.
US3148956A
Expired / Lapsed
US
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Dust-free cabinet
Assignee: Plastigage Corp
•
Filing: 1961-04-18
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Granted: 1964-09-15
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Expires: 1981-04-18
Abstract
No abstract record available.
Inventors
- 👤 Frederic B Hetherwick
- 👤 Phillip A Hayner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:57
CPC Classifications
B; B25; B25H; B25H1/00; B25H1/20; F; F24; F24F; F24F8/00; F24F8/10; F24F8/108; Y; Y10; Y10S; Y10S55/00; Y10S55/18; Y10S55/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2084006A
Cited
US2509300A
Cited
US2639958A
Cited
US2709954A
Cited
US2999448A
Cited
US3115719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |