US2985915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoforming process for thermoplastic sheeting
Assignee: Hedwin Corp
•
Filing: 1958-12-12
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Granted: 1961-05-30
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Expires: 1978-12-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Winstead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:44
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/42; B29C51/08; B29C51/30; B29C51/421; B29C51/422; Y; Y10; Y10S; Y10S264/00; Y10S264/33; Y10S264/73
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |