US2976387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater band
Assignee: Acra Electric Corp
•
Filing: 1958-05-28
•
Granted: 1961-03-21
•
Expires: 1978-05-28
Abstract
No abstract record available.
Inventors
- 👤 Donald W Browne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:13
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/54; H05B3/56; H05B3/565
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1642197A
Cited
US1994759A
Cited
US2592549A
Cited
US2545653A
Cited
GB676655A
Cited
US2791624A
Cited
US2795685A
Cited
US2849582A
Cited
US2817742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |