Patent US3456380A successfully refreshed from Google Patents.
US3456380A
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Illustrative object forming bookcover
Assignee: MARGARET M CAMERON
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Filing: 1966-08-08
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Granted: 1969-07-22
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Expires: 1986-08-08
Abstract
No abstract record available.
Inventors
- 👤 Margaret M Cameron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:56
CPC Classifications
A; A63; A63H; A63H33/00; A63H33/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB321369A
Cited
US363143A
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US1130818A
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GB190815696A
Cited
US1580285A
Cited
US1999796A
Cited
US1867374A
Cited
US2032531A
Cited
US2183443A
Cited
US3161343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |