US3433212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circulating heater
Assignee: ALLOYD J HOFMEYER
•
Filing: 1966-05-09
•
Granted: 1969-03-18
•
Expires: 1986-05-09
Abstract
No abstract record available.
Inventors
- 👤 Alloyd J Hofmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:22
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/08; F24H3/087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1357598A
Cited
US2289759A
Cited
US2488548A
Cited
US2619022A
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US2843108A
Cited
US2811151A
Cited
US3306334A
Cited
US3274991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |