Patent US2680269A successfully refreshed from Google Patents.
US2680269A
Expired / Lapsed
US
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Multiple pane window and door construction
Assignee: Individual
•
Filing: 1950-09-18
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Granted: 1954-06-08
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Expires: 1970-09-18
Abstract
No abstract record available.
Inventors
- 👤 William C Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:35
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/66; E06B3/677; E06B3/32; E06B3/34; E06B3/42; E06B3/46; E06B3/4609
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1703066A
Cited
US1893525A
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US1913205A
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US1860273A
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US1760598A
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US1965461A
Cited
US2198436A
Cited
US2266346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |