US2440664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Making lap-welded articles from thermoplastic films
Assignee: Dow Chemical Co
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Filing: 1945-07-28
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Granted: 1948-04-27
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Expires: 1965-07-28
Abstract
No abstract record available.
Inventors
- 👤 Carroil R Irons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:07
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/004; B29C53/00; B29C53/36; B29C53/38; B29C53/385; B29C53/40; B29C65/00; B29C65/02; B29C66/0046; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29C66/49; B29C33/00; B29C33/44; B29C33/52; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1036; Y10T156/1038
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1674526A
Cited
US1920961A
Cited
US2107249A
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US2114625A
Cited
US2192527A
Cited
US2358455A
Cited
US2381074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-27 | 1951-10-27 | 1952-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-27 | 1955-10-27 | 1956-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-27 | 1959-10-27 | 1960-04-27 | $7700.00 | Window Closed / Lapsed |