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US2913778A
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Door and window structures
Assignee: ALTEX CORP
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Filing: 1957-07-22
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Granted: 1959-11-24
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Expires: 1977-07-22
Abstract
No abstract record available.
Inventors
- 👤 Robert L Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:03
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/34; E06B3/04; E06B3/06; E06B3/08; E06B3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1650640A
Cited
US1750664A
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US2559764A
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CH253896A
Cited
US2829744A
Cited
US2784459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |