US2339003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making thin-wall insulators
Assignee: Hartford National Bank and Trust Co
•
Filing: 1939-11-07
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Granted: 1944-01-11
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Expires: 1959-11-07
Abstract
No abstract record available.
Inventors
- 👤 Boer Jan Hendrik De
- 👤 Verwey Evert Johannes Willem
- 👤 Marinus Gerard Van Bruggen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:52
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; Y; Y10; Y10S; Y10S264/00; Y10S264/63; Y10S425/00; Y10S425/012
Claims Analysis
Total Claims: 0
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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) | 1947-01-10 | 1947-07-12 | 1948-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-01-10 | 1951-07-12 | 1952-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-01-10 | 1955-07-12 | 1956-01-11 | $7700.00 | Window Closed / Lapsed |