Patent US3310896A successfully refreshed from Google Patents.
Patent US3752351A successfully refreshed from Google Patents.
US3752351A
Expired / Lapsed
US
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High impact resistant double-walled container
Assignee: Individual
•
Filing: 1971-01-27
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Granted: 1973-08-14
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Expires: 1991-01-27
Abstract
Abstract Plastic double-walled containers having a high impact-resistance wherein the space between the outer and inner walls is filled with a hardened gypsum cement and resin combination.
Inventors
- 👤 K Nagata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:17
CPC Classifications
B; B32; B32B; B32B13/00; B32B13/04; B32B13/12; A; A45; A45D; A45D40/00; A45D40/0068; B32B1/00; B65; B65D; B65D11/00; B65D11/16; B65D81/00; B65D81/02; B65D81/022; B32B2307/00; B32B2307/50; B32B2307/558; B32B2315/00; B32B2315/18; B32B2439/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1317; Y10T428/1321; Y10T428/24; Y10T428/24744
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
16 words
A container as claimed in claim 1 in which said gypsum cement is plaster of paris.
References Cited (Backward Citations)
US128725A
Cited
US165357A
Cited
US858583A
Cited
US1298202A
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US1383838A
Cited
US1901556A
Cited
US2711766A
Cited
GB904650A
Cited
US3096897A
Cited
US3120570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |