US2581977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for sealing plastics
Assignee: Individual
•
Filing: 1948-09-09
•
Granted: 1952-01-08
•
Expires: 1968-09-09
Abstract
No abstract record available.
Inventors
- 👤 Kenneth F Spalding
- 👤 Fred V Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:18
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/80; B29C65/00; B29C65/02; B29C65/18; B29C65/22; B29C65/221; B29C65/224; B29C65/228; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/81; B29C66/818; B29C66/90; B29C66/91; B29C66/912; B29C66/9121; B29C66/91211; B29C66/91212; B29C66/91231; B29C66/914; B29C66/9141; B29C66/91421; B29C66/91431; B29C66/9161; B29C66/91641; B29C66/91651; B29C66/91655; B29C66/96; B29C66/961; B29C65/38; B29C66/812; B29C66/8122; B29C66/94; B29C66/949
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2325094A
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US2093745A
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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) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |