US2001663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater
Assignee: Erie City Iron Works
•
Filing: 1932-10-17
•
Granted: 1935-05-14
•
Expires: 1952-10-17
Abstract
No abstract record available.
Inventors
- 👤 Carl T Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:44
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/04; F28F9/06; F28F9/14; F28D; F28D7/00; F28D7/16; F28D7/163; F28D7/1653; F28F2265/00; F28F2265/26; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/427; Y10S165/432; Y10S165/433
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) | 1938-05-13 | 1938-11-12 | 1939-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-13 | 1942-11-12 | 1943-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-13 | 1946-11-12 | 1947-05-14 | $7700.00 | Window Closed / Lapsed |