US3477184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational playhouse
Assignee: THEODORE W JOHNSON
•
Filing: 1967-05-08
•
Granted: 1969-11-11
•
Expires: 1987-05-08
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Johnson
- 👤 Ralph Siivola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:09
CPC Classifications
A; A63; A63H; A63H33/00; A63H33/008; E; E04; E04B; E04B1/00; E04B1/343; E04B1/34315
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2623249A
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AT179405B
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US3017970A
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US3137967A
Cited
US3369335A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |