US3476915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Immersion heaters
Assignee: MICHAEL J RAPSIS
•
Filing: 1966-03-17
•
Granted: 1969-11-04
•
Expires: 1986-03-17
Abstract
No abstract record available.
Inventors
- 👤 Michael J Rapsis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:04
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/78; Y; Y10; Y10S; Y10S439/00; Y10S439/933; Y10S439/936
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA554606A
Cited
US1334035A
Cited
GB647178A
Cited
US2690541A
Cited
US2904769A
Cited
US2977456A
Cited
US3134888A
Cited
GB969381A
Cited
US3230492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |