Patent US3527252A successfully refreshed from Google Patents.
US3527252A
Expired / Lapsed
US
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Assignee: Cutler Mail Chute Co Inc
•
Filing: 1968-04-23
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Granted: 1970-09-08
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Expires: 1988-04-23
Abstract
No abstract record available.
Inventors
- 👤 George Richard Cook
- 👤 Marlowe A Hain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:00
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/52; B65G53/56; B65H; B65H2701/00; B65H2701/30; B65H2701/37; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87788; Y10T137/87804
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2586144A
Cited
US2728356A
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US2831651A
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US3157543A
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US3132669A
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US3089515A
Cited
US3174806A
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US3324895A
Cited
US3395731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |