US3580762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making double-walled plastic articles
Assignee: King Seeley Thermos Co
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Filing: 1969-01-23
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Granted: 1971-05-25
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Expires: 1989-01-23
Abstract
Abstract A METHOD OF MAKING DOUBLE-WALLED, HEAT INSULATING PLASTIC TABLEWARE OR OTHER PLASTICE ARTICLES OF A TYPE HAVING RADIALLY SPACED INNER AND OUTER SETS OF SEATING AND MATING SURFACES FUSED TOGETHER BY A SPIN WELDING OPERATION.
Inventors
- 👤 Fred R Zumstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:15
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/06; B29C65/0672; B29C51/00; B29C51/006; B29C66/00; B29C66/001; B29C66/50; B29C66/51; B29C66/54; B29C66/545; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81431; B29C66/816; B29C66/8161; B29C66/82; B29C66/824; B29C66/8242; B29C66/83; B29C66/832; B29C66/8322; B29C66/70; B29C66/71; B29L; B29L2024/00; B29L2031/00; B29L2031/712; B29L2031/7132
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |