Patent US3491501A successfully refreshed from Google Patents.
US3491501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Edge joint for doors,windows and other building units
Assignee: BENGT A LUNDGREN
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Filing: 1968-05-01
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Granted: 1970-01-27
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Expires: 1988-05-01
Abstract
No abstract record available.
Inventors
- 👤 Bengt A Lundgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:45
CPC Classifications
B; B62; B62D; B62D33/00; B62D33/04; B62D33/044; E; E06; E06B; E06B3/00; E06B3/96
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |