US3221959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knapsacks
Assignee: Individual
•
Filing: 1963-06-03
•
Granted: 1965-12-07
•
Expires: 1983-06-03
Abstract
No abstract record available.
Inventors
- 👤 Earl W Southwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:15
CPC Classifications
A; A45; A45F; A45F3/00; A45F3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A FLEXIBLE KNAPSACK DEVOID OF A RIGID FRAMEWORK AND ADAPTED TO BE ATTACHED TO SHOULDER WORN SUBSTANTIALLY RIGID BACKPACKS COMPRISING, TWO PAIRS OF INTERNAL AND EXTERNAL SIDES JOINED LENGTHWISE AT THEIR FRONT AND REAR EDGES, THE EXTERNAL SIDES FOLDED OVER AT THE TOP AND BOTTOM OF THE KNAPSACK AND THENCE CONNECTED TO THE INTERNAL SIDES THUS FORMING TWO SEPARATE SACKS JOINED AT THEIR REAR EDGES AND BOTH SACKS TERMINATING IN A FRONT EDGE CONTAINING A MULTITUDE OF EYELETS, SAID SACKS EACH HAVING A CLOSABLE OPENING THEREIN, A THONG FOR LACING THROUGH THE EYELETS IN THE FRONT EDGES OF THE SAID SACKS IN ORDER TO SECURE THE FRONT EDGES OF THE TWO SACKS STATIONARY ONE WITH RESPECT TO THE OTHER WHEN LOADED WHILE PERMITTING RELATIVE MOVEMENT BETWEEN THE FRONT AND REAR EDGES THEREOF AND
Claim 2
Dependent Claim
133 words
A FLEXIBLE KNAPSACK DEVOID OF A RIGID FRAMEWORK AND ADAPTED TO BE ATTACHED TO SHOULDER WORN SUBSTANTIALLY RIGID BACKPACKS COMPRISING, TWO PAIRS OF INTERNAL AND EXTERNAL SIDES JOINED LENGTHWISE AT THEIR FRONT AND REAR EDGES, THE EXTERNAL SIDES FOLDED OVER AT THE TOP AND BOTTOM OF THE KNAPSACK AND THENCE CONNECTED TO THE INTERNAL SIDES THUS FORMING TWO SEPARATE SACKS JOINED AT THEIR REAR EDGES AND BOTH SACKS TERMINATING IN A FRONT EDGE CONTAINING A MULTITUDE OF EYELETS, SAID SACKS EACH HAVING A CLOSABLE OPENING THEREIN, A THONG FOR LACING THROUGH THE EYELETS IN THE FRONT EDGES OF THE SAID SACKS IN ORDER TO SECURE THE FRONT EDGES OF THE TWO SACKS STATIONARY ONE WITH RESPECT TO THE OTHER WHEN LOADED WHILE PERMITTING RELATIVE MOVEMENT BETWEEN THE FRONT AND REAR EDGES THEREOF AND
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |