US1533801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing low temperatures
Assignee: Individual
•
Filing: 1921-01-03
•
Granted: 1925-04-14
•
Expires: 1941-01-03
Abstract
No abstract record available.
Inventors
- 👤 Heylandt Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:45
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/02; F25J1/0201; F25J1/0202; F25J1/0002; F25J1/0005; F25J1/001; F25J1/0012; F25J1/003; F25J1/0032; F25J1/0035; F25J1/0037; F25J1/0045; F25J5/00; F25J5/002; F25J2235/00; F25J2235/02
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) | 1928-04-13 | 1928-10-13 | 1929-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-04-13 | 1932-10-13 | 1933-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-04-13 | 1936-10-13 | 1937-04-14 | $7700.00 | Window Closed / Lapsed |